Window problems

i have a 2door 99 grand am. A few days ago while rolling up my passenger window the crank seemed to get stuck. After a little elbow grease I heard a crack and something fall to the floor and the window would no longer roll up or down. The next day the same thing happened to the driver side window:uhoh:. After removing the inside panel I observed that all the clips that held the windows to the pulley system have broken. They are metallic clips, shaped in an L with plastic at the tip. I have been searching for these clips but cannot find a name or a place to get them. please help