Actually I don't think it's as difficult to get animals out of Austrailia as it used to be, I think there is a lot of paperwork and time involved but it's not impossible. I believe that Nick Mutton of Inland Reptile has gotten quite a few carpet pythons out of Austrailia in recent years.
From what I understand from the people in Australia breeding the Blueys that they can't be exported at all, due to their protection status. Other species I don't know.