As per title, I bought some chrome backed mirrors for the 550 cheap off fleabay. They are OK I suppose, they look decent enough, but suffer from the dreaded blurr once you get above about 3000 rpm. They are also quite small in diameter (100mm) compared to the ones I got with the bike (115mm) when I bought it. Has anyone found a decent replacement mirror supplier with products that don't break the bank and (perhaps) you can see behind with at speed?