I was thinking that I could start with flat sheet stock brass. I would take a bending brake and fold it to 90 deg. I found a shrinker/stretcher for $89 that should do the job. I will practice on some scrap aluminum from work before I try on the brass though.
That drawing on the catch types is great for me. I think one of those would be better than what I had in mind.
I don't have the tools to press the halves out (stamping press) and I will have to see how smooth I can get the metal after shrinking the radius. However this will have to wait until after the holiday before I can get started.

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