The idea of a ladies large leather handbag is not all that unreal. I have seen men who did exactly that. Picked up a leather purse (they like the kind with a front flap) for a better word at a thrift store. Then they pulled all the brass buckles, snaps, etc. With some leather needles, they added some buckskin strips around the end of the flaps and actually when finished they had a high dollar possible bag that looked pretty good. It looks like it was home made. But it beats spending hundreds of dollars for a custom one.
If your not into the entire mountain motif, and simply want a practical, easy to clean, numerous pockets, possible bag you can make a good one out of old blue jeans. If your sensitive about the jeans, dye them black. But you have a numerous pocket possible bag for something you should throw away anyway. I'd hate to think how many old pair of jeans I have floating around the house.