You can get them through with an engineers report. But you also have to put up with all the same attention from police you get if you drive any distinctive car.
They are pretty over the top these days, and no doubt they bring too much attention which will continue to make it harder to have them on cars. So bad publicity of them even on this site brings any car modification under scrutiny, and that effects all car lovers. However bull bars are an essential item for a lot of Australians.