Window rollers

The driver's side window on my 70 Challenger wouldn't roll up right anymore so I pulled the door panel off. I found one of the rollers on the vertical track in the front was broken. Is it possible to change them out with the window still in the door? It seems like I might be able to unscrew the roller part from the piece that slides in the track. Any recomendations on a source?
Author: Andrew_r/t