WTB: A simple screw that I cannot find! The window stopper

If any of you have ever taken your window out, you'll notice on each door there is a "window stopper" This stops the window from sliding too high up or too low down. I cannot level my passenger side because I lost one of those.

Just a simple little screw that will take 5 minutes to get to! If anyone is in the NYC area, PLEASE PM me!