Though I don't compete, I can also recommend El Paso for quality cowboy leather.
They are not just another maker of old styles of holsters, but can trace their history back to making leather gear for real wild west lawmen and desperados.
I have their "Duke Rig", of the style worn by John Wayne in a lot of his '60s westerns, and their "Patton Rig", the holster/belt combo made famous by Gen. Patton.
Though not western gear specifically, my holsters and belts from Davis Leather are of very high quality, and they have a good range of western gear.
The late Gordon Davis was in on the ground floor of cowboy action shooting.
A buddy puts his SAA in a rig from Black Hills, and it looks like quality.