Window Regulator Problem

Can't start a Monday without a problem I guess. I went to roll down the driver side window this morning and something snapped and hit the bottom of the door. Now my window is 1/3 down. It'll roll down, but not back up. I'm not sure what the chance of repair is as I didn't have any tools to pull the door panel.

In the event that the regulator is completely shot, does anyone know where I can get a replacement? Or if that is not likely, what might I need to repair it?