Nothing availible that I'm aware of ? The 7075 chassis is not cheap but a worthy investment, it's way better than the stock chassis.
Look into converting a D8T, the parts are acyually cheaper and easier to find and a lot of stuff swaps over from one to the other.
The diff cases have the same part number, compare the part numbers
http://www.hotbodiesonline.com/parts...pe=STD&lang=en
Ebay has a lot of parts
http://cgi.ebay.com/NEW-HOT-BODIES-D...item483d63e586