I think it's a good thing that breeders there don't recognize "teacups" as a breed or the correct term in describing a Yorkie because it is neither. It is a good way to get a lot of money for a very small dog.
Most good breeders would never consider using this term.
There are lots of great breeders in the US. Depending of quarantine law in Australia, could you fly to the US, get a pup from a good breeder and fly back with it in the cabin?