I have both left and right door latch mechanisms and both need repair.
All that is required is the replacement of a (different) spring in each latch.
Is there some body or company that restore these latches, or are they now junk thanks to the failure of such small and inexpensive parts?

Failing that, has anyone got feedback on the the OER replacements? Or should I look for good but hard to find originals instead?

there are repair kits out there. Just check the camaro parts suppliers like rics first gen. classic industies, etc. ebay

gotsnappy