Hi, there are many TB's here doing tours of the Land of OZ on behalf of their owners. If you are looking for someone to release your bug(s) here please feel free to PM me.
I am not sure of the statistics but yes from time to time TB's do go missing - perhaps you could be specific in your mission for your TB to keep it away from caches that are visited by tourists or caches that are easier to access and allow the locals to move it along via caches that have a bit more of a local flavour. Plenty of Australian towns have iconic landmarks that the average visitor does not normally see. Maybe this way your TB can visit some of the "real Australia" and then, if the opportunity arises sometime in the future, you can retrace its steps to experience our Land as we experience it rather than the whistle stop tour of the tired and jaded tourist.
The Aussie caching community is, in my opinion, a great bunch and would be pleased to move your TB along as per the mission specified.