My driver side wing mirror has snapped from the base that bolts to the car it looks like the pot metal / aluminium casting has broke on the inside , is there any way to repair them of how to strip them down to investigate it further ?
If you type in "loyal" you should get 10% off X8RX8R do a repair kit on ebay or direct from the company, although it’s not metal
I carried out this repair a few years ago and it worked ok, you just have to spray the base to your car colour.
Other option would be to source a good used one.
Good luck
Norm