eBay would be the best bet. Or you can try YouTube. Might sound funny I have a Nissan Titan body myself coming from a buddy off YouTube. You can also try searching for one here. As soon as you hit 50 posts you can check on the Buy/Sell/Trade section. At 100 posts and you create a thread yourself. Good luck man.
I thought I'd try finding one for you as an example. So here:
http://cgi.ebay.com/XMODS-2004-Mitsu...ts_Accessories