I'm not sure of other superchargers for the 1MZ-FE but the only kit I know is the TRD (kazuma) one they sold in the US but it's useless here unless you drive a LHD car. Master cylinders block the S/C pulley... plus it's for the non VVTi 1MZ-FE which I believe all 1MZ-FE sold in Australia were not (i.e. we got the VVTi).
As for the handling kits, whiteline should have the works. A lot of the Camry boys in the US order the rear sway bar as it's a thicker bar than the TRD ones (from memory 2mm thinner in diameter). This maybe a start to getting the handling you want to get a taste of what you want later.
Coilovers are a waste of money unless you're going to get on the track. As mentioned earlier, just get some decent set of springs (Eibach makes springs for the Camry) and good shocks + harder bushes.