I played a lot of Star Frontiers a long, long time ago! For the life of me, I can't remember what the Dralasite ships looked like.
Have you tried a software package called Doga L2? Somebody on one of the SE4 forums (I can't remember who, or else I'd give them the credit) posted about it and I downloaded a shareware copy. It makes designing ship really easy, because you can pick from premade ship/mecha parts and piece ships together.
You can find it at
http://www.doga.co.jp/english. Registration is only $49, which is a steal in my opinion for what it can do. The texture capabilities aren't anything to write home about, but it's so easy to use that just about anybody can make some pretty cool ship sets.