Yep here -
http://www.beltingonline.com/3mm-htd-timing-belts-4573
Awesome company, order any belt any size and it comes in 2 days !!!! and they're cheap ...
The only thing is the belts are a little stiffer than the usual RC stuff, and the tooth shape is a little more square, I think a bit more like the Losi xx types ...
Hope that helps ...