There are no "rollers" on the stock window regulators. They had round leather washers which slide in the track. Classicparts.com carries plastic rollers which are easy to install and work very well. You simply remove the old pin/rivet which formerly held the leather sliders, and install the new plastic rollers in the hole where the old one was and mash the rivet end holding it in place.
BTW, with all of the trouble which you have had with multiple broken panes of glass, I cannot understand why you did not replace ALL of the window tracks and stop bumper while you had the door apart......twice.
Carl
