It says on their website that this is old wood, not recently cut. They had it in stock some years ago and then thought it had got lost - but they found it again.
They also say that they have about 30 back and sides sets.
It's a prettier wood than the now usual East Indian rosewood with more interesting figures in the grain. Some say it sounds better, but that's not a unanimous verdict.
There are other woods that can (at present) be legally used, that are attractive and which are reckoned to sound very similar.
Cocobolo

(this darkens with age. My Morgan has cocobol bindings that were once nearly blood red but are now almost as dark as the East Indian rosewood back and sides - but East Indian doesn't have the same figuring)
Camatillo
Ziricote (my choice for a dream, money-no-limit guitar)
African blackwood (here with a little steak of sapwood)