Any suggestions for repairing broken metal pin on the top side of an older window and screen. Some of top right metal "pins" (pin that slips into the track that slides the window and screens into place) are broken and we haven't been able to find anyone who repairs hardware issues like this on older windows.

There's a "PERFECT" stamp label on the bottom left side of the window hardware, and "SEAL" stamp label on the bottom right side of the window hardware.

We're guessing these windows are probably 50 years old, but in decent shape 'cept the screens don't fit "tight" cuz of the broken top pin.

Any suggestions?