there's a few good ones along beaufort st too - memory lane is a costume hire shop but they sell all that kinda thing too
also i think the vinnies around there has some pretty retro stuff (can't remember exactly where sorry). maybe try the good sammys up there too - haven't been but heard of some pretty cool things about it.
also on beaufort st (can u tell i live around here?
) mum's retro boutique - that has some pretty wicked stuff too, lots of old school stuff as well.