I think many collectors have given up on harangueing salerooms offering 'dodgy' or repro items, sadly.
At the end of the day it makes GOOD sound sense if you spot any such to simply put your opinions in writing in a quick, polite, email. Keep note of the response.
Never give up trying to protect the very hobby we all enjoy, every little helps & it also helps potential newbies getting stung.
The saleroom which offered these told me they were not contacted by anyone prior? Did anyone advise?