HPI Racing makes a Chevy Monte Carlo body:
The body's width is 200mm meaning it fits 1/10 scale nitro(gas) powered R/C's. HPI Racing also makes those black stock car rims, which are 26mm and fit nitro cars.
www.towerhobbies.com is a great place to buy R/C stuff. Fast shipping, good service, and good prices.
This is a pretty good site as well for beginners:
http://www.easyrc.com/