Well I finally got around to making some bar risers today. I was originally going to make a CNC program and just knock it out that way but, I didn't feel like playing with featureCam and decided to manually machine it. It is made out of extremely hard plastic with properties close to that of phenolic. I could have made the standard barrel style bushing spacers but I think that the look of a Genmar style riser is much cleaner. Now if I can find some dam hardware I'll be set.