I'm currently using this which I bought off of Etsy but I'm not sure if the maker is still selling them. These are great and material and construction is top quality. The only ssue I have is that discarding or throwing the trash can be tedious because you'll have to remove all your gear to dump the contents or handpick the garbage from the bag.
I just bought another pouch, an Allen competitor one, with 2 compartments. I haven't used it yet but I like the fact that it has a detachable drawstring bag which I will use for garbage for easy discard. It also already comes with a belt unlike my current one.