Plastic window slider thingie Options

[Ctrout]

There was a recent thread about window glass not staying in the mechanism that raises and lowers it. I was having a problem with this as well and found that the cause was the rear nylon slider in the regulator. It was completely worn out so that the ball would pop out of the socket and cause the part that grips the bottom of the window to go crooked and the glass to fall out. Anyway, after searching for terms like slider, nylon, window regulator etc. I was unable to locate a source for this part. Does anyone sell them new or is it NLA? Could I get one from a VW or Audi at a junkyard? Sorry I don't have any pics, I didn't take any while the door was apart and I'm not going to take the door apart again until I find the replacement part.