Traxxas is one, they offer replacement bodies for the Slash 2wd and 4×4. Pro Line is another company that offers bodies for the Slash. Usually a little more expensive, but the designs are original look cool. Jconcepts is the maker of the Illuzion Slash bodies. I think they make the best bodies. On my Slash 4×4, the Illuzion body has held up the best. They seem thicker more rigid then the other bodies I have gone through.