I've dealt with Batchelors almost from it's inception, and never once been let down by them. Incredibly helpful, amazing stock, nothing seems to be too much for them. The only let-down is their mail-order service, which is lousy......baffling, really, when they are so good in every other way. However, if you do ANY kind of leathercraft then Batchelor's "hole in the wall" is the best place to go. You won't find better, and the prices are pretty good, too. Parking isn't too bad, either, if you don't mind leaving the car a couple of hundred yards away.
J T Batchelor stocks leather skins that are sold by weight. They also sell buckles and fittings as well as offering a leather dying service.