are you looking for a bookmatched set ready to use, or a larger slab that you can resaw yourself?
I snagged a couple slabs on my last wood buying trip. I sanded a spot on one of these pieces so I could grab an image of the typical figuring hiding behing the very rough surface
it's difficult to find a source who's selling something large enough for resawing into tops. much of what is offered on eBay simply isn't of a usable size for bass building.
all the best,
R