Good luck finding a junked car with power windows. The power window option is fairly rare on the hatch. I had to order a JDM piece to fix my broken passenger side regulator.
Before you go through the trouble of locating a new unit, pull your door panel off and take the regulator out. It is likely the plastic piece that everyone is talking about. You can make some ghetto fixes that work or are a temporary fix until you can locate a new unit. Here is the piece we are talking about:
This JDM unit (passenger side) seems to have a metal piece that supports that plastic part in the middle. Simply put, this plastic part holds onto a metal "ball" on the window cable. When that breaks, the cable moves free and the widow doesn't move. Likely you get the "ball" to catch when you roll it down and it holds well enough to move the window up a few inches. Here is link to the part number:
http://i165.photobucket.com/albums/u71/ ... CT0004.jpg
This is for the passenger side unit. The driver's unit is either 63 or 65. Pretty sure it's 63. Check out J-garage for a new unit. Here's a link:
http://www.j-garage.com/