Looking for window track roller for rear 1/4 window

Hello guys, im looking for a roller assembly for the aft rail on the passenger side window. It has a total of three rollers on it, two riding on the rail and one in the window "action".
If you would like I can try and post a picture.

Its hard to see with everything in place. I somehow have misplaced mine. (probably fell out of rusty Quarter).
Thanks

Steve