I know there are no skinny Pigs in NZ (Yay! I'd love to meet one but am glad that the breeders can't get their hands on any. Take the good with the bad) and I'm not sure about this but don't think there are any in Aus either.. I could be wrong about Aus but I know NZ doesn't.
I don't think skinny pigs are available in Australia. According to wikepedia, the breed began in the late 1990s so I don't think it would have spread to Australia yet. But like rodentcuddles said, it's good that breeders can't get their hands on them.