You're serious? Well, that's going to take a ton of fabrication, due to in part there is NO company that makes replacement shells for crappy Radioshack cars. You'll need to find an S-10 1:18th scale body from a hobby store, and paint it on the inside. Then cut it out, and try and fabricate some body mounts out of straws or some cylindrical plastic. It's going to be rediculously hard tho, unless you feel it necessary to use duct tape, then just duct tape the body on.
