Yes the TRD supercharger won't fit the Aussie Camry. Your best bet is a custom job. Being MAP sensored, you will probably need a computer as well. Lots of headaches.
I'd personally sell the Camry and get some kind of JZX Chaser. It'll probably cost just as much turboing and tuning a 1MZ, but you'll have a better engine in the 1JZ-GTE. It's also RWD so no FWD torque steer problems and the gearbox is made for the power.