To avoid using a costly OEM second gen roller, you can use a roller and pin from a 4th gen F-body. It isn't an exact match, but does work on second gen hinges.
These are GM parts and are still available from GM:
Pin = GM # 20262500 - $1.32 each
Roller = GM # 20058035 - $10.49 each
A little heat and light hammer taps and you can R square these relatively easy....