I used to breed them in Pheasant Creek, and at the time there weren't many options in the area and I had regulars for quite a distance all around, although I still mostly sold in Melbourne. I'm not sure if anyone else has stepped in to fill the gap. There was someone starting up in Diamond Creek as I was leaving the area, but I think he was only selling wholesale.
I'd say your best bet would be to keep your eyes open and in the mean time find a supplier in Melbourne.