89 Jeep Cherokee Passenger Mirror Backplate
 

Anyone know where I can get a new mirror with the back plate? Or find the back plate?

When you say "back plate", are you after what the glass mounts to, or the triangular piece that mounts to the door?

The plate that the glass mounts to. The mirror fell out on the highway (could not recover) with that plate on it. I can find the glass but not with the plate. Only other option is the full mirror assembly. Any suggestions?

https://www.quadratec.com/jeep-repla...xj-mirrors.php

Quadratec is my go to site for replacement parts. Hope this helps. I'm not sure if you can just buy the back piece by itself