If you are referring to the all rubber stem bumpers that push into the holes on the bottom flange of the hood, I used these from Steele Rubber Products:
https://www.steelerubber.com/gravel-shield-bumper-33-0016-451fa71c752d4bb6bcaac337f13091.jpg
9cbf46d02f2cd131606885904c39.jpg
They fit in a 3/8" hole. They also worked great on the bottom of the rear jump seats where the seats rest on the rear wheel wells.
This was on a true 69' model. Not sure if they would be the same for earlier years.
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