No. I'm not even in Australia at the moment
But I wanted to purchase there because I have an Australian credit and so to avoid the foreign exchange that they would charge if I bought elsewhere

I used flightplanet.com.au . It is a fully accredited travel agent, been around for years.

However they do charge a service fee. I was told it is normally 8% of the ticket value, but I got a discount to 5% (so I paid $241). They also charge a fee for paying by credit card (1.5% I think, but I go that waived).

To purchase a RTW ticket, you should be able to phone Qantas direct