Projects 41 Ford Dash switch holes

I'm working on repaint the dash in my 41 Ford. There are three switch holes on the lower right of the steering column that I would like to fill. They range in size from 3/8" to 5/8" in dia. I don't want to weld them up. Any ideas where I can find some sort of plug to fill the hole

 

McMaster Carr and Fastenal I believe offers them in plastic/rubber.
Are you looking for the steel ones or anything? You could make a piece of thin gauge material in the shape of the lower dash section and put mounting tabs on the back side so you can remove it later if you chose.

 

Gardner wescott might carry some kind of chrome plug.