Welcome to the board, phreaktor.
I don't think anyone has any models made of parts, unfortunately. It might be worth asking BBT if they still have any engineering drawings or whatnot from the Larami days (many of their employees were back at Larami). Some sort of 3D scanning software might be useful too, but I don't know how accurate they are.
But I'll mirror what HBWW says: I don't think the 3D printing is going to be of much help. For some parts, maybe, but durability will be an issue. And when I 3D printed some parts for a Nerf project back in 2009 or so, I found the tolerances left much to be desired (to the point where I had to sand a part flat because it came out warped), as did the surface finish.
SEAL, the metal "3D printer" probably uses selective laser sintering (SLS). Might be a more viable option, though I think it's pretty expensive. My university has a bunch of 3D printers in their MakerSpace
. There also are some SLS machines in the machine shop, too, but I think those can not be used for personal projects.