If the brand has a distributor in australia, you are supposed to buy through there, and not direct from any store in the states, its in the agreement that the resellers have with BG's. When I had the store, I had to get my stock from the australian distributor (a big store in north queensland) instead of going through BG's itself, unlike happy heiny, who I was able to buy direct from.
You are supposed to buy directly from the distributor or their resellers, and if a store sells to you from overseas - they could get in trouble if found out.