Almost all you see are repos. They have been making them for a long time and they are almost impossible to tell an original vs a repo. .
I would venture to say almost all you see advertised as real, are probably repo someone's aged artificially.
I would almost just contact Bill Bentz and buy a repo and age it. I have an original one that I know for certain is real and when I set that one next to Bill's I can't tell other than the finish on his new.