There are several threads from the last few months that listed many suppliers. Unfortunately, I couldn't find any with a quick look.
You really only want to use carbide bits with wood, as steel dulls very quickly. Also, resin buildup is only a problem when cutting softwoods like pine, or some plywoods. The key to keeping heat down is to run at the proper feedrate for the rpm you're using.then they will build up with the resins in the wood, sticking to the bit, and at these high speeds will heat up and anneal the steel
Here's a few suppliers.