I've never seen either of these gynaecologists so I can't personally recommend them, but I've heard of transfolk having had surgeries with them:
Dr Joseph Elbeaini
161 Bigge St
Phone: 02 9822 7400
Fax: 02 9822 7411
Here's a write-up of someone's experience with him, as blogged on the website for ACT trans* organisation, A Gender Agenda.
I've also heard of Dr Anne Pike. More details about her here: