Help Help HELP ME!!!

I'm from NSW, Australia...and in desperate need of locating a store that sells 50's swing dresses. I have NO idea where to start looking, and I can't buy over the internet (otherwise I would've found the PERFECT PLACE)...as I need to be able to try on the dresses...
CAN ANYBODY be of any assistance?
It would be GREATLY appreciated...=D
Thankyou...