My man Scott (harpersgrace) makes some very fine natural slingshots, both "beanshooter" style and more modern pocket models. Here's a video review of one of each.
A couple things: I said in the video that I wasn't sure what his e-bay account name was. Well, it's "harpersgrace". I'm not the brightest bulb in the chandelier sometimes. Also you'll notice I'm shooting pretty good size stones with the beanshooter. The 1/2" Lintanex bands do great with these and seem like they'll last a hundred years. I'm barely stretching them at all. Get them from Gary Flatband, I highly reccomend them for the traditional shooters.
A couple things: I said in the video that I wasn't sure what his e-bay account name was. Well, it's "harpersgrace"