I saw the miror recommended by t4mv and that is what I went into my LBS to get. Walked out instead with one similar to the one fitted to Betty. Had it on for a couple of years and I don't think I use it very often. That is until I ride the TCR that does not have a mirror and I miss it---a lot.
It may seem large but the thing works so I am loath to try any other type.
The bike is looking better every time you post an update.