Darryl,
Have you PM'd Fristcher, to see what he has (are you looking for a bridge with thru saddle?)? At least once, I PM'd him thru eBay to ask for a specific item, and he put it for auction for me. Although his tenure at Westerly wasn't as early as the 60s, perhaps he scored some older NOS when the plant closed down? You might also check with Hans... he had some '70s era rosewood bridges... maybe he has some older ones, as well.
Dave