http://stores.ebay.com/EXOTIC-WOODS-OF-THE-WORLD?_rdc=1
I get a lot of my exotics through this eBay seller.
Bad Side: virtually no combined shipping, can't see the wood beforehand, REALLY rough-sawn so you have to mill it yourself, no figured stock
Good Side: even with shipping prices are usually below market, really fast shipping time
I've ordered probably 50 boards from him, and only one went bad. That one cupped & twisted after I started milling it, but it came in flat, so it wasn't his fault.
Yeah that's where I got the Burl from for this project. I've gotten lots off of him too. I usually just straight to his site though.