Sadly, I haven't found any either. My group is currently using the Star Wars ships rules (from the second ed, I think) and have to basically "build" the ships from scratch. There is a program that we use made by Okina-rdae technologies (their name, I didn't come up with it) that lets you create stat blocks for all kinds of ships and vehicles. I'll try and find the link and post it later. Really great program, too.
Oh yeah. Dragonstar also has rules for starships and vehicles.