ok.. 99 prelude ...i got a place that can put in a new gear for my drivers side window..but they cant get the part! what do i do i tried auto zone and i dont wanna go threw the a dealership of course! ...the gear is missing 5 teeth? ..so im assuming something is causeing that but idk it slides up and down the track fine and the motor is strong it just gets about 2 inches from the top and then knocks like crazy

thanks alot