I know it's not quite what you were looking at, but have you considered towing at a gliding centre? If you can get a dozen hours of tailwheel experience it's a decent entry level spot. Good to build another couple hundred hours anyways, and it really helps your stick and rudder skills.
I'm not sure how the situation is in Australia (or New Zealand), but I know a guy who is going down to NZ to tow this summer, so they're probably looking for pilots. If you contact a few local gliding clubs you can get a good idea of what they're looking for.