How do you put power window back on track?

I have a 93 Jeep GC. You can put the window back on track but it will certainly come off again. You need a window regulator/actuator. Ive done a lot of research on the web and it seems that most jeeps are having the same issues with the Windows. The part is pretty expensive. Someone told me you can use the rollers offf of a sliding screen door instead