We made a 2wd chassis to test a new layout for 2wd buggies. We made it fully in carbon fiber and aluminum because we don't like the plastic 2wd buggies from the big manufacturers.
The chassis plates, front damper mount, front and rear bulkheads are custom made. The rest of the parts are from a TRF 501X and the front suspension is from a B4.
You can read more here:
http://supertec.wordpress.com/