I had similar cabs and hinges in my 1966 house. When I had the cabs painted cream, they also hand-painted the copper hinges to match the new nickel pulls. It held up perfectly for 20 years. No new holes to drill or old holes to fill. Sorry, I don’t have a photo, and I just replaced the cabs so I can’t take one (and I kind of miss my cute little hinges). IDK what kind of paint they used, I do remember (because I was amazed by it) that it was a blend of colors on her brush that looked like nickel when she finished. Give it a try, might be easier than finding the perfect hinge.

3/8” inset cabinets have very few hinge choices. And inly one, if you want concealed soft close. It is much better to replace the doors if you want to replace the hardware.

https://www.rockler.com/salice-soft-close-110-3-8-rabbeted-door-hinges-face-frame

We thought about painting them, I’ll do some research. We might be able to sandblast them (we sanded one and it produced a nickel color). I had no idea these hinges were so dated until after we started this project; unfortunately new doors are not currently in the budget.

New paint grade doors are as cheap as the hinges. Then you can use the $3 hinges. Those are circa 1970. They deserve either to be restored, or buried. Not much in between works.

This also happened to us when we painted cabinets in a house circa 1968. Husband used a wire brush to clean and polish after cleaning them in a solution (can’t recall). After cleaning and drying I used a metal paint to paint them. We had no choice, couldn’t find a replacement. Good luck!