I may be pilfering that kickstand mod viewtopic.php?p=585199#p585199
Best mirror for the case you have is what I did on DayGlo Avenger. I used the clamping arrangment from a seatpost, to grip the handlebar at the end of the bar. Then used one of the clamping washer sets that usually holds the under-seat wire frame to instead grip the normally threaded-in part of a moped or motorcycle mirror.
I used the bolt from the seatpost clamp to hold it together, as I don't need to adjust it that way, but if I did I would instead use a QR bolt from a seatpost, so I could simply flip it open and swivel the mirror out of the way when leaning it against something, then swivel it back and clamp it tight when riding off again.
Alternately just don't tighten it quite that hard with the regular bolt, and swivel it anyway.
There are several ways to do this kind of thing; this was just easiest with parts on hand.
Some pics of DGA's mount, which I have also used on CrazyBike2: