For someone who knows and owns the right software, it should be fairly easy to produce more Descent-Models. Just extract the polygon models from the game, then unfold them with something like Pepakura. I know people did that with Polygon-models from other games. Yet, learning how to do that may actually not be so easy, if you don't know a bit of programming, I guess.
Thanks for the pdfs, Steve, I already downloaded them.