I was at my local Tandy last week, looking for a few tools, and saw that they had some 7 - 8 oz leather on sale. I looked at about five pieces but none looked good enough for what I make. The Salesperson explained that their sale leather isn't always the best and to buy their more expensive leather. It looked much better so I bought a double shoulder. That will last me for a while.
I've found a few on line leather companies now that I've ordered leather from. SLC, Weaver, Montana and Maverick Leather have all sent me good pieces. Let me add Weaver as well, I've bought a few tools from them and even had to return a rotary punch with no problems in getting a refund fast.