I noticed this guy on Facebook who is making metal re-creations of dealer plate frames. They look real nice. I contacted him to get information about pricing, and such here is what he gave me.

Definitely an option if you can’t find what you’re looking for.
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I tried to add all the photos at once, but it only took one. Read my last posting first and then the top one for my conversation with the guy that makes these.

I don't care for the repro stuff, but I have found some originals around.