I think you need to understand..there is no where else. As Halas says there is Learmonth and Adelaide.
There is Kalgoolie, you might get it in, but I doubt it will come out.
Local knowledge, you could land at Pearce airforce base with out a problem.
But as far as the legal planning alternates go, Learmonth, Adelaide, Alice Springs, Melbourne, Sydney and Brisbame are about it.