Have you fixed yours yet? I have the same issue and I ordered the black rollers p/n 1000058 from RT Specialties. When I got them, I realized they weren't the right ones.
I called RT and he said I needed p/n 0764325 which is a white roller already attached to a ball stud. I asked him if he was sure because mine are black, he said the factory may have used some black ones.
It looks like a PITA to get the clip off the back of the stud. If you know an easy way to change it let me know, because my windows seem to roll up and down just fine, I'm not sure if I want to pull the whole assembly out to mess with that one roller.