I bookmarked 51 businesses this afternoon to look at in further detail, by searching with the word 'Australia'.
The majority are companies in Australia, with a few in the States or Asia, that would sell to start up businesses.
Usually there is a minimum order involved, with companies in Australia offering shipping based on weight instead of per item.
Some are reviewed, some not. I've had a quick look at their websites, but now I have a list, I can check them out in more detail.
I believe that I'll find a couple to start off with.
I hope that helps, but I would be interested to hear from other members in Australia too and how they started.
I find this forum really useful. By reading questions and answers and working my way through the education sessions, I have made a good start.