I used a kyosho lazer zx-5 body for it. I also have the ofna ext chassis, so its a good fit. You just need to do some liberal cutting and extend the side walls down about 1 inch (in order to fully cover the chassis). I just used two pieces of scrap from the shell to make the side extensions.
There's two sides to every schwartz, he got the up side and I got the down side.