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.
There are a number of different wood and metal styles available on ebaY, but as far as I am concerned the most attractive and the most versatile (you can display the top or the bottom of your board equally well) is the hand-laminated, two-tone wood surfboard wall rack presently available at www.woodensurfboards.com. You can purchase these racks direct from Erik Hurst at this site, or watch for his sale price offer on ebaY. I have four sets of these racks (two from Erik) and I love them. They display vintage longboards from the '60s especially well. Tell him 'Peter Wittstock' recommended his racks to you. (PS I do not receive compensation for this plug.) Best regards.