Wait, what? Bitex hubs of Taiwan, one of the largest hub manufacturers in the world, is owned by a small custom wheel builder in Sussex, England? A guy who says on his website that he maybe can't answer the phone, because he is busy truing a wheel? Are you sure about that? Honestly I don't have any information to the contrary, but that just doesn't make any sense.
Did you check with one of the largest importers and both wholesale and retail sellers of Bitex hubs in the US, Bike Hub Store, just down the road from you in Richmond, VA? He has the black. To my knowledge he doesn't do special order colors, but I could well be wrong.
__________________
Robert
No matter where I go, here I am...