Stan Wilder wrote:

You can buy an accessory type rear view mirror that glues to your
windshield and put it where you want it. They come with a mirror that
mounts to a small base so you could take it off and leave only the small
mount.

The only trick is to mask off the spot that the mount goes to and scrub
it real good with bon-ami or dutch cleanser to make a good bonding
surface. Use the Bon-ami or dutch cleanser dry but on a paper towel or
soft rag.