I have a 1300 WORD number for my business. Go to the
Smartnumbers website and check the availability of the number. If it's available you can place a bid for it, then the number will be placed in the next public auction.
I entered the minimum bid for my number ($500 from memory) and no one bid against me when it went to auction.
As you'll see, this service is run by the ACMA which is part of the federal government.
Anyway, the website is pretty self explanatory.