Kim,
Try a google for Ancestry - Australian Electoral Rolls, 1903 - 1980. It should be first or second on the list that comes up, and you just click it and the page that comes up is the page you fill in with a few details. I had a look at your tree then I tried looking for Kenneth Henry Hellard, and I think he may be at Carlton, Scullin, Victoria in 1963, as follows:-
Kenneth Henry Hellard 294 Canning St, N4. Roof plumber.....Phoebe Hellard. Home duties.....Elizabeth Marion Hellard. Packer. [All three at same address]
Are these your ancestors? Brian