The only legal herp allowed in australia is the axolotl. There are people with exotics that are held under special permits, issued during amnesties and the like. But these are the only exceptions. Exotics cannot be legally bred and traded.
Depending on the definition of "recent", There have been a number of reptile/amphibian imports in recent years. Melbourne Zoo imported the blue, splashback and (more) dyeing poison dart frogs only a few years ago. I believe the veiled chameleon was another recent addition. moving further back, Philippine crocodiles, Romer's tree frog, three striped box turtles and Fijian iguanas are more examples.
In addition I do believe new specimens of existing species have come in here and there.