There is a surplus of bachelor males, however many of them are related to the US population already, and therefore of no use to import. Even of the animals that have been imported from Europe over the past 15 odd years, literally the *only* ones that are bringing in unrelated genetics to the population are Yasmin and her son. All of the others are children or grandchildren of Alexander, who is a full sibling to Lily in Canada and Phoebe in the states.
truth be told, the US really does not need any new animals right now. They still have a number of founders that are poorly represented, and while there is more demand than there is animals, with the herpes vaccine and increased breeding frequency, the US will more than likely be able to breed to desired demand over the next decade or so, especially if facilities like white oak, Rockton and Houston end up doing herd splits. Between those three facilities alone, they could successfully yield at least six different splinter groups that could be parted out between facilities, while still retaining matriline‘s of their own.