There's always looking towards the Klingon Academy community; The Yamato-class FBB--intended as an Experimental Battleship in 2291 (if I remember correctly), originated from that game, as would most of the Klingon, Romulan, and Gorn vessels seen since SFC1. The stock FBB in SFC1 and SFC2 is a more-simplified look of the Yamato-class designed for computers that--compared to today's tech--seems a bit primitive. KA's FBB model is a higher quality, however not by much. Although it's more-detailed, a bunch of polygons I believe were used for the "ginzu" effect, where when you damage a starship's hull, the appearence of damage in the area hit would emerge.
I believe Dark Drone once converted it for SFC1, but I'm not sure if he did for SFC2... It was years ago, though. I believe I have a copy of it for SFC1, but I'll have to look somewhere in my room for the CD that has it.