Great places to order from!
Here are some great online suppliers of wholefood ingredients that will mail Australia wide. You could either get a group together to do bulk orders together, or you could order on your own in larger amounts than usual, ordering every few months. Just make sure you store your bulk orders properly (storage tips here), to keep your products safe from insect damage and mould.
The Source Bulk Foods (photo above)
Green Caravan (a co-op and online store)
Feel free to add your suggestions in the comments below!