Harrah's is selfish.
They made them ... didn't like them (they were made for high rollers - engraved their names on them or something) and won't give them up
I hear they are AT the casino - in the vault... but no one can get them.
Someone actually told me they SAW some in the cage, but was told they couldn't sell them

and I can't find one... although I've been actively chasing them for 1-2 years