Oh my god.. I am so sorry.
Myxomatosis is a horrible thing, and for awhile I was extremely paranoid. Digging through the hay for signs of mold, ensuring that no flea hopped onto my pant leg, no flies were allowed through the door.
I don't live in Australia, but I am so sorry that you're experiencing this. I could only imaging the horrible sensation when your rabbit comes down with it. I'll be praying for you =[