Went out and had a look at the business after hours, no indication of whether or not they are open to the public, but signs on the front doors were more or less only directed at retailers.

So I sent them an email a few days ago, and got this response:

We are not open to the public at all, only toy related retail outlets
So I guess if you have an ABN you can go through them, but not sure what their policies are regarding # of items and whatnot.