I made my own. Get some 1/2" flat stock, bend it in a vice so the top will sit flush against the wall. The remaining flat stock should be bent to the angle you want with a hook at the end for the board to sit in. To finish it off get some 1 1/2" or 2" insulating foam from Home Depot/Lowes, slip it over both of your hangers, drill two holes on the flat part of each hanger to mount it on the wall and you're done. Mass produce these and retire.