Hey Ryan,
Here are a few files for you!
C-base drive base you just need to choose long or wide configuration, just scroll down to the bottom.
http://www.andymark.com/ProductDetai...ctCode=am-0205
Some of the andymark chassis pieces are here if you scroll down, don't download the IFI kop chassis!
http://team1323.com/cad/pages/drivetrain.html
Good luck!