2003 Olds Alero power window hardware. Where to find?

Have a 4 door and on the driver's side window, the 2 plastic parts that are glued to the bottom of the window that allow it to go up and down broke off for some reason. Salvage yard is out of the question as they are bonded to the window so well that they would be destroyed getting them off. Any ideas where to find them without buying the whole window? Thanks so much