Realistic ways of getting rare (and not) animals in the Speculative Zoo Design section

[amur leopard]

I add that breeding of Tasmanian Devils (and imports of a few pairs from Australia) actually happens in Europe (Kobenhavn, Prague...). Several zoos of New Zealand (where there aren't native marsupials) have also them according to Zootierliste. Maybe the situation is different in America or other continents, where breeding pairs should be totally absent (I don't know anything about this point).
It may be an exception of the general ban you've described, due to the endangerment (and charisma!) of this species.

The most important difference is that the new individuals are essentially broadening an already present genetic pool of the species in Europe in an attempt to start an ex situ breeding program. Many of the suggested imports coming in to the various fantasy zoos that I have seen suggest bringing in ridiculous numbers of species that aren't in captivity anywhere from a country that would never let them leave. It's hardly the same thing as the devils...