There's rumoured to be one in this country with a Motown collector, again rumours. Reg Bartlett was acknowledged as having one of if not the best collection of Motown, he may well have had one, who knows. I was told Berry Gordy bought his collection, dunno how true that is????
Pretty sure when Ron Murphy got his collection, through one of the pressing plant employees I believe, he said just six were pressed and later ordered to be destroyed with one copy foir Motown's files. Two are definitely known to have not been destroyed so it stands to reason that others could be out there.