The internal bolt on my side mirror rusted off and I broke my mirror housing. After seeing the price of getting one replaced I decided to take a crack at modeling my own. I used the passenger side housing as a reference for the design to try and match the OEM as much as possible.  This model is just the DRIVER SIDE housing that holds the mirror itself, NOT the hinge or bracket that attaches to the car door. If you need the passenger side, just mirror(pun intended) the model in your slicer. In bambu,  right click-→mirror-→mirror x - axis

I've included my fusion360 file and 2 different version of this model

VERSION 3 - Slightly too small and you have to use a heat gun/hair drying to warm up the plastic enough to press in the mirror glass. After the plastic re-hardens, your glass will be permanently encased. to remove it you'd have to re-heat the plastic, or cut it out

VERSION 5 -Similar to the OEM design, the slightly larger opening for the mirror glass allows it to slide in and out freely. You have to print out the brim, snap it in, and glue or plastic weld(recommended) it in place after putting in the mirror glass. 

FILAMENT

I'd definitely recommend at least PETG for this. I printed my draft model of this in PLA and held up better than expected, lasting several months with outside temps in the low 90s(Fahrenheit.) Eventually the hinge kept softening and I kept needing to re-tighten the spring bolt. So anyways…PETG for the win.