This is where I found Tilba's breeder.There's an impressive list here but I noticed on the original post some links to Australian breeders...
It's a whole lot easier to just go to http://www.dogzonline.com.au and click on the breed you are looking for.
There are puppy and adult listing for sale ALL from reputable breeders... you won't find a BYBr here.
There are also show results from all over the country to help you select a breeder from a 'winning' kennel if you are interested in showing.
Most breeders have links to their own private sites from this page.