Left side outside mirror for 1973 Duster. Not remote control

I can't be sure these are the OEM mirrors, they are the same on both sides of the car, so I assumed they were.

I "fixed" my broken mirror by cleaning it out with isopropyl alcohol, then filling the insides with RTV silicone, scotch taping the 2 halves together in place, then pushing 2 3-1/2 inch long nails in through the RTV. Once the RTV dries, that ought to be pretty solid.