I don't know about those kind of scholarships and if they exist and where, but my only advice to you would be to go get those Uni Information Books out (uno the ones that nearly every Year 12 student has piles of, collected from those career days and semiars? lol) and search through every Unis Scholarship pages.
If you still can't find any, best to call the Uni's on the numbers on the back of the UAC Book to save wasting time and to directly find out the way each uni conduct their scholarship packages etc....