I need a trim ring, or whatever you might call it, that holds the glass in place in the driver's side mirror. I was driving and the glass fell out--luckily I had the vent window open, so I caught it. These two pieces came out

Here is the empty housing

Here is the housing with the glass back in it

You can see that there is nothing to hold the glass in. That is the piece I lost and the one I need. Let me know if anyone has one, or knows where to get one. Thanks.