I got a pair of the cheap ebay FZS1000 mirrors on the boxeye, and they are alot better visibility wise. They do shake a bit, but at least you can see beyond elbows. I has to run a M6 die down the thread as its wasn't quite right, by hand as the studs are close together.
ebay seller was xmotor-2008
Left hand one collects rain when your're parked as i have found out these last couple of weeks...