We've recently been informed that GameTech Miniatures has ceased production. Scott Flower, owner of the company, is reportedly shutting down for personal reasons.
The Space: 1889 molds are apparently available for sale, though any transaction would require permission from Frank Chadwick (who holds the rights to Space: 1889).
The molds are said to include two ships never released to the public - the Japanese flyers Mikasa and Yashima.