I too am having the same problem. I live kinda in brisbane city, an really wanna make my own chesses. But it is so expensive to buy the milk. If you find a way to resolve this problem, please let me know too.
Thus far I have threatened to approach the first dairy farmer I find and offer to sponsor his cow for a share in her milk.... not sure if this is possible or even likely. But I think my husband is going to keep a close eye on me if I get to go to the ekka.