Are there good shops any where in melbourne that sell music posters?

My room is lacking in posters so any places in Melbourne were they sell Music Posters (like David Bowie, Nirvana ect.) would be great. It would be good if they were cheap aswell but it doesnt matter that much.

Try any of the Readings Bookstores, i would say they would be your best bet, otherwise try Target or Kmart