only perth and melbourne have held onto emps - and fortunately they both decided not to phase them out and went with a plan to develop a population of nominate subspecies purebreds.
now last i went melb had one pair on display with the other tamarins and one hybrid (sadly kept alone on the other side of the zoo). they were looking to import more from europe so my guess is that they have, and one pair was brought in on behalf of wellington zoo as new zealand can only import primates via australia.
thats three zoos holding emperors. goodstuff.
currently in australia we have cottontops, emperors, golden-lions, golden-headed lions and common and pygmy marmosets.
since tamarins and marmosets are small and don't take up much room at zoos i actually hope we maintain the lot since collectively, they could make an awesome, super popular exhibit. the whole free-ranging idea is something that is not often adopted and i'm imagining an area like this with little free-ranging troops of each (or taking turns).
think about it - "monkeys in miniature" or something like that.....