73 Dart rear side window parts

I was working on my Dart today, robbing parts from a parts car to fix up all the windows so they will operate properly. The rear side windows would **** to the side, due to the rear guide not doing its job. There is a 2 sided roller which helps keep the back of the windows in line, and between 4 windows (my Dart and parts car) there was only one in good condition. :wack:

Is there a source to replace these? Perhaps someone has an extra? I need one more!

Thanks!