I don't think BAW4742's '66 is a good canditate for restoring with all original parts. I would just try to make it look original. I have no idea what original threaded saddles would cost but if someone wants a lot of money for them I'd pass. Get some new threaded saddles and relic them a little and put them in there. You've got the bridge plate. That's what's important.
Here's an example of high priced vintage parts. A guy on eBay wants $495 for this '63 bridge.
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Jack's Disclaimer: When I say something.... always ask yourself ..... "What the hell does he know?" _
Guys - learn to disable the flash on your digital cameras.