All the 13, 1300 and 1800 numbers that can be used to make words are are all owned by a governmental branch called the ACMA. They have a public website called Smartnumbers. If you are looking for a number that makes a word - go and search directly on the smartnumber website. If its available, you can purchase it direct from Smartnumbers.
The process is an auction, so it may be in your best interest to keep it to yourself until you win - and please allow upto 4 weeks to win the auction and have the number activated.
You can expect to pay the $42 fee to be able to bid on a number. Most numbers start at $250 each
Unfortunately, there are some Telecommunication suppliers out there who exploit this system and purchase numbers on the customers behalf and then lease the number back to them at exorborant rates.
Whilst we respect the business model and we don't have a problem with the leasing of the numbers (If they have bought the number before you came along, then fine) - its more that the consumer isn't aware of the process and doesn't have the option of purchaing the number themselves at a discounted rate.
We advise everyone to purchase directly from Smartnumbers to avoid this problem.