Yes, you read that correctly, 100% propane for bushwalking.
The ideal set up is the 226g 100% propane Bernzomatic PowerCell -- if you can find them. They're out there, but they're tough to find. I have no idea if any of these have ever been available in Australia. Please forgive my ignorance.
Absent a PowerCell, you can use an adapter like the Kovea LPG (propane) adapter with common 400g or 465g propane cylinders, the kind used for car camping or propane blow torches.
What are the considerations involved with the use of such an adapter and 100% propane for bushwalking stoves? I address these and other practical matters of propane for bushwalking in my latest blog post: 100% Propane For Bushwalking.
HJ