2 Stores that I know of Mike,
One's on Crner Parramatta Rd and Pyrmont Bridge Rd, Annandale - Billy Hyde Drum Clinic. There is also a store in Willougbhy.
There is another music store 2 shops down from Astro-Opticals at Crowsnest - can't remember the name. You could treat yourself to something whilst your there
!
Cheers, Norm