Neville:
They do ship internationally. The owner, Denny Bennett, can quote you a price if you give him your address. Here is a link to his site (the 929 page specifically)...
RIMZ 929.. 9 mm
His contact info is on the site.
Not knowing what ammo is available in Australia, I really think this is your best bet, since these don't seem to be ammo specific the way the metal clips are. Plus no special tools to moon or demoon the ammo.
Not cheap, but less than the premium metal clips that may or may not work with whatever ammo is available there.
Here is my 929...
Good luck.
Adios,
Pizza Bob