Hi storm. Are you able to request a referral over the phone? Both my GP and FS have done this for me on the provision that I make an appointment to discuss the results. Women's diagnostic at the Mater (South Brisbane) accept faxed referrals (if they do that particular scan). They will also give you a price over the phone if you call. Also ask if they are able to bulk bill, it would reduce the upfront cost, rather than having to go to Medicare.
Qscan is also at the Mater.