So, we have a bunch of sliding glass doors in this unit, 8 I think. One handle was loose and the screw was stripped, I thought. Anyway, I get it apart (never done this before) and find it's broken inside. I ordered a new door handle, they APPEAR to all be the same dimensions, I can't tell why they could be nonstandard, we'll see.
If this works and is easy, I may replace them all. They are pretty crappy, probably 33 years old now, and ugly.