I picked up my bike used and it only had a left side Rizoma Retro on it, no right side mirror http://www.amazon.com/PAIR-Quality-Mach ... RPB2Q01TEV.

They come as a kit with bar end adapters however I already have the Rizomas so I just used the mirrors and plastic spacer and they work great, no vibration or issues, tinted glass just like the Rizoma and I have a huge field of vision behind me, can't tell a difference between these and the Rizoma other than the Rizoma name on the one.

Anyone looking at mirrors I highly recommend them.

Had something similar fitted to my old 990, the glass had a blue tint which was easy to scratch up.
Got to the point that you couldnt see out of them anymore and they went in the bin.