Thanks everyone for the tips and suggestions.
I am going to play with some of your ideas, and see what works best.
Today I grabbed some 1/2" Aluminum rod at Home Depot, and knocked out several simple experimental holders that I can clamp in the ball vise to play with.
I will play with hot glue, and just ordered some glue sticks designed for the body and fender industry, for pulling dents. That sounds like it should hold up to setting with a punch.
I have plenty of jet set already
If this works as well as I expect, I can see how I may use these little holders for more than just holding bezels. I made several small holders because I anticipate they will come in quite handy.
I would have used brass, had it been avaiable in 1/2", but Al should work just fine.