I recently had to research and install a complete belt drive setup on my wagon. After a lot of looking, I decided on a complete setup from Jones Racing Prodcuts.
It was developed on the track, and is reliable on the street too.
http://www.jonesracingproducts.com/kits.html#1049-S
They are awesome to work with and will create what you need if they don't stock it. Their stuff is modular so it can be updated down the road.
Everything I got from them bolted up without any headache and fit like a glove. It works great and looks bad-ass too. If you're planning to set up a front belt-drive system, look over what Jones has before laying out cash to anyone else. Trust me.
Oh- and I wouldn't recommend Synister products to anyone. They simply don't deliver what they promise.
~Scotch~