There are few ways for you to get a Webkinz in Australia.
1. You could locate "Mark Jones Designs." It's on 66 South Street, Rydalmere, 2116, NSW, Australia, and it's number is 61-02-9684-6909, and its fax is 61-02-9638-2159. They also have a site you could probably order one from if you can't take a trip there. Its
https://www.mjdesigns.com.au
That's the only retailer from Australia on the Store Locator list in the site.
2. You could purchase an online-only Webkinz from the Webkinz eStore. They offer the White Poodle, Tree Frog, Bulldog and Black and White Cat (VIRTUAL ONLY. NO PLUSH COMES WITH IT.) to international countries like Australia. (By international I mean other than the United States and Canada.) You just need a credit card to purchase from there. (By the way, its www.webkinzestore.com )
3. If there's no way you can purchase from Mark Jones Designs or the eStore, then try eBay or Amazon.
That's all I can think of for Australia.