They are packed with the maps unfortunately so there's no chance of getting them in a usable state(yet). You can get them with Ninjaripper but the UVs are destroyed beyond repair. EDITED! Hey, I'm also interested in extracting some of the assets from the maps. I've been playing with NinjaRipper for...

Any ideas on where to find levels/maps? I've found many references to maps in general, but the files seem way too small to be the actual model data.