When the plastic bushing guide rollers break and cause the quarter glass to have difficulty raising...How does one either repair or locate new bushings?

Yes, I have done the dreadful removal of the quarter glass lift assembly. I can't seem to find them out there anywhere and moreover, I don't immediately see how to get the old ones off and new ones on (the center bolt doesn't seem to be removable and there is no "back". Do they just lift/pop off? Anyone know where to find the right size match?

It's a plate that you unbolt. The nuts are flat and have 2 or 3 holes for grip. I'll try to remember to get a picture when I get home tonight.

you have to buy the whole plate. toyota does not sell just the bushings.... and it sucks

I was afraid of that. I've seen these for sale:
https://i.ebayimg.com/images/g/33oAAOSwtZVZqbUy/s-l1600.jpg

I'm guessing then that requires some serious metalwork/machining?

Does anyone know what material these things are made out of?

Do they HAVE to spin/rotate or is just keeping it 'on guide' sufficient? If that's the only alternative, I'm going to test something that might be helpful for others out there.

I dont recall mine spinning. I believe they are fixed. But its been long..