Ive actually responded to several private messages from AU members on this matter. I have responded with the same comments. There are many suppliers listed on salehoo that are AU based. The numbers arent in the thousands like the US suppliers but there are actually a few hundred listed.
My recommendation is to use a supplier search and in the drop down menu hit advanced search. Use the letter A as your search word and then search suppliers in AU.
We are always building our list of suppliers for every country we can but of course need feedaback from members to know which suppliers to beef up on.