I hate to ask this question but how do you remove the driver side mirror? I don't see any mounting bolts on the opposite side of the door panel (removed). And the only other possibility is a small slot on the front of the mirror pedestal.
There is a small screw in the mirror that runs parallel to the plane of the door. It is normally
covered by a rubber lip. Remove the rubber, loosen the screw, that will separate the mirror
from a funny holding piece that keeps it tight. No mounting bolts on the inside of the door, all the action takes place from outside the door.