Believe it or not but Cycle Gear. They were some cheap mirrors on sale for ~$40. Got them while waiting for Lux machine to design his own. I can't get myself to spend $300 for the arrows. The cheap mirrors while they seem to move very easily, they have not moved during rides with speeds in excess of 120 so I am ok with them. I did have to build a shim out of poly tubing that I had laying around the house because the Ducati threaded bar ends are odd sized so the provided shims did not fit. Plus, I did not want to swage the metal onto metal and damage the bar end threads as they would come off on track days and the stock ends would be installed. I can take a picture of the exact method if you are interested. The tubing came off a some extra after the Chlorinator unit was installed on our pool and can ship you some through the mail if needed as I have plenty to spare.