Addicted to Fabric seems to have the best range and quality for dressmaking fabric. They also have a beautiful range of patchwork fabric which you could use for dresses or tops. As someone else said in another thread you could walk over from the woden bus interchange.
I also try to check out the op shops - there's usually a box of fabric scraps around.
I just wanted to let you know that Fitzpatterns is having major computer troubles at the moment so if you have bought or emailed me lately (last two weeks) I have only not responded because things are in hardware bits. Hopefully everything will be repaired this weekend and there may even be some new patterns up their shortly.