1967 Plymouth Barracuda antenna

I have seen repops listed for big $$$, but I don't know that I have ever seen an original for sale. I just bought a used antenna from some unidentified 60s Mopar at Spring Fling, figuring I could cobble it up and hardly anyone would be able to tell the difference. I mean, it's easy to see the universal fit aftermarket ones aren't OEM, but who knows all the details of all the factory ones? Especially the really rare ones?