Up for sale is a M style side mirror conversion in mineral gray from
Autotechnik. It’s listed for $350 on their site. Fit and finish is perfect, it was only installed for a month, less than 100 miles, and it’s been living in the garage. This looks so much better than the cap replacement. The entire mirror housing is replaced, using all of the other stock pieces.
Edit: These are currently off of the car. I can add pictures of them after they’ve been wiped down if anyone wants.