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PCCG has the largest range of mechanical keyboards in Melbourne, and probably Australia. Although their range seems to be changing - they have no CM and no RealForce any more
CPL also has a few, although they no longer sell CM either (where I got mine from a year or so ago).
Or consider ordering from, say, qtan. I bought a KeyCool from him recently, cost less than getting a QFR from QLD (which is about the only place still selling them in Australia).
PCCG has an excellent range of Ducky board (excluding TKL, although they are apparently supposed to be getting Shine 3 TKL in November). Ducky is good. I have two