Any suggestions?

 

I buy 3" round mirrors for all my bikes. Usually mount them below the bars as that's where the vision is best. Depends on the bike, tho. I cut the stems short, usually at the mirror end, but sometimes the other and then re-thread the stem. Also, I only use 1 mirror. And then seldom use it because I look around a lot.

 

On my buddy's 87 fxr he has the short stem rectangle shaped, but I often see him having to lean to the right to check behind him.

 

How about a bar-end mirror?