I can't keep the window in it's channel on my driver side door. I am ready to replace it but can't find a new one in Chevy Trucks or LMC. I tried bending it tighter but could not get window in so I expanded it back out and it fits in but not tight enough. I can roll window down if I pull on it and force it into the channel as I turn the handle. Do I need to just keep playing with it or is there a solution to keep window in track.

Any suggestions?

1965 chevy stepside