I had a pair on my ZZR for my indy trip... they fuck'n rocked. the mirrors weren't horrible before... but I was amazed what an 1" extension could do...
They'll be one of the first things I put on my new bike.
I got them from Twisted Throttle... they make some for many different models of bikes...
I know Smilie was interested... here's what the ones for his 636 looks like
https://www.twistedthrottle.com/trad...view/2526/563/
The ones for my new bike... 600RR
https://www.twistedthrottle.com/trad...view/2512/223/
what the ones on my ZZR looked like
https://www.twistedthrottle.com/trad...view/2518/223/
here's them on my bike
