mirror mounting

[65chevysub]

I had to knock out all 3 bolts and nuts from my drivers door for the original mirror, and was wondering what would be recommended to put in the holes as far as bolts and nuts to hold an original mirror on the door? I'm not overly concerned about it looking factory as it's a daily driver. Also, does anyone have a template I could use for the opposite door(passenger) to mount one there as well? I tried to make one but it didn't come out right?
Thanks everyone and have a safe and happy labor day.
I uploaded pictures of both doors so you can see what I'm working with