Eisenwerk Miniatures and their Space Tak rules and minis evolved to become PewterCraft with their expanded GaLakTik TakTik line of starship miniatures and expanded rules.  Note that the name is correctly spelled with the capital L and T's as you can see in this rules scan.  These miniatures are not common but some can still be found through auctions and resellers.  The molds for these minis are in private hands and they have been looking at casting more for sale.
 
There are five identified major Empires: The Dominion; Earth Colonies; Black Alliance; Konfederation X; and, United Science Associations which control most of the planets within the explored sectors. There are also numerous minor powers and space pirates who prey on intergalactic trade.  Recently, aliens from another galaxy, The Omega Aliens, appeared in this galaxy and began raiding planets of the major Empires. The Omegan’s goal is to rid the galaxy of all intelligent life forms other than their own.
-From the GaLakTik TakTiK rulebook
 
GaLakTik TakTik Conversion Notes and Standard Ship Classifications

 

Black Alliance More than 10 Standard Years ago Residents of the Dominion Political Penal Colony "PolCol 107" staged a well-planned revolt against their guards. Surprisingly they won. The victorious prisoners then captured several Transport starships, armed them with a variety of weapons fabricated in the colony’s workshops and set about freeing other prisoners throughout the galaxy. Organized as the Black Alliance, so named for the black prisoner garb worn on the penal colonies, these rebels see themselves as fighting against political oppression and slavery and call themselves Freemen. There is enough talent among the other freed prisoners to provide a surprisingly effective political and economic framework to control the growing number of planets in the Alliance. With the industry of the penal colony fabrication plants to draw on, it has become a formidable force. Alliance starships have arrow shaped bridge structures located at the front of the ship, and are designed for evading Dominion Star Cruisers and raiding Penal Colonies. Therefore, speed and survivability have taken precedence over weapons Systems.
Alliance Marauder Item# 7707 - CA Mass 34 NPV / CPV 111/89 Ave Hull 10 (2/2/2/2/2) 29% Thrust 5 FTL 2 PDS 2 Fire Cons 1 Class 2 Beam Battery (FP/F/FS) 1 Pulse Torpedo (FP/F/FS)
Alliance Man-O-War Item# 7708 - BC Mass 52 NPV / CPV 170/145 Ave Hull 15 (3/3/3/3/3) 29% Thrust 5 FTL 3 PDS 2 Fire Cons 3 Pulse Torpedoes (F, F/FP, F/FS)
Alliance Mammoth Item# 7709 - BB Mass 70 NPV / CPV 231/210 Ave Hull 20 (4/4/4/4/4) 29% Thrust 4 FTL Level 1 Screens 4 PDS 2 Fire Cons 3 Class 2 Beams (F/FP/AP, F/FS/AS, All Arcs) 2 Pulse Torpedoes (2xFP/F/FS)
Alliance Black Prince Item# 7814 - BA Mass 116 NPV / CPV 380/399 Ave Hull 35 (7/7/7/7/7) 30% Thrust 4 FTL Level 1 Screens 5PDS 3 Fire Cons 6 Class 2 Beams (2xF/FP/AP, 2xF/FS/AS, 2xAll Arcs) 3 Pulse Torpedoes (3xFP/F/FS)
Alliance Behemoth Item# 7810 - BM Mass 160 NPV / CPV 529/625 Ave Hull 45 (9/9/9/9/9) 28% Thrust 4 FTL Level 1 Screens 6 PDS 4 Fire Cons 8 Class 2 Beams (FP/F/FS, 2xF/FP/AP, 2xF/FS/AS, 3xAll Arcs) 5 Pulse Torpedoes (3xFP/F/FS, F/FP/AP, F/FS/AS)
Alliance Space Fighter Carrier Item# 7804 - CV Mass 120 NPV / CPV 394/306 Ave Hull 35 (7/7/7/7/7) 29% Thrust 4 FTL 4 PDS 2 Fire Cons 5 Class 2 Beams (FP/F/FS, F/FP/AP, F/FS/AS, 2xAll Arcs) 1 Pulse Torpedo (F) 3 Fighter Bays
Alliance Planet Protector Space Base Item# 7818 - SB Mass 202 NPV / CPV 570/486 Ave Hull 60 (12/12/12/12/12) 30% Thrust 2 No FTL 5 PDS 4 Fire Cons 5 Class 2 Beams (FP/F/FS, FP/AP/A, FS/AS/A, 2xAll Arcs) 5 Pulse Torpedoes (FP/F/FS, F/FP/AP, F/FS/AS, FP/AP/A, FS/AS/A) 3 Fighter Bays 24 Mass Replacement Fighters 20 Mass Cargo Holds

 
GaLakTik TakTik Conversion Notes
Ship Name:  The name of the miniatures changed a bit over time so I have combined/consolidated them for clarity.
Ship Classifications:  See table below. A miniature's name in the product list often does not match the classification indicated.
Systems and Stats: These are  based on the stats for the miniature in the GaLakTik TakTik rules.
Weapons: GT Beams roughly convert to FT Beam weapons.  GT Torpedoes convert to the other weapons on the ship which vary in order to add more flavor between fleets using the Empire's background as a guide..
Screens: Based on GT Shield rating - <20 = 0, 20-35=1, 36+=2.
Thrust: Usually equal to GT ship design's Tactical Manuver rating.
Miniature Identification: I have most of these miniatures but I am missing some plus several are loose so I have tried to determine the correct item number for those miniatures but may be incorrect.
 
GaLakTik TakTik Standard Starship Classifications

BM - Behemoth	BA - Super Dreadnought	BB - Dreadnought	BC - BattleCruiser
CA - Heavy Star Cruiser	CL - Scout Cruiser	DD - Destroyer	DE - Frigate
CV - Fighter Carrier	FF - Fighter	SB - Star Base	RR - Space Raider
SR - Research	TT - Transport