They minted a few hundred thousand Peace Dollars in 1965 (dated 1964), but supposedly all were melted. Of course, they said the same thing about the 1933 Saint Gaudens. Think that a '64 Peace Dollar will turn up one day?
I assume that you mean a genuine minted 1964 Peace dollar, and not the copies that you can find on eBay. See:
316,076 were minted, to be exact.
This seems to be IMHO material, and has been fodder for numismatic conspiracy theorists for years.
IMHO, no, I don’t think one will turn up. I can’t help but think that one would have turned up by now, if any had escaped the Denver mint.
Oh, and welcome to the Boards, zapp and brianmelendez!