Could you use any of the available 3D Printing/Additive Manufacturing sites and download weapon models there?
I know yeggi.com is a nice one... here's a few example weapons that might be "easy" to texture.
http://www.yeggi.com/
Skull Axe
http://www.thingiverse.com/thing:164345
Light Saber? Heh...
http://www.thingiverse.com/thing:321812
Another cool sword here:
http://www.thingiverse.com/thing:192098
May find some time to play with it this weekend.
~Reppots (from SoD forums)