There are superchargers for the Prado 150 with the same engine. Although I'm not sure they are bolted on to any 5 th gens they should be compatible. They also have the dual vvti engine. Its about $10k for a complete setup. So there really are superchargers in kit form if you really want one.
I have an over-hyper 5 yr old son who can add another 30 hp for you....If not I think i have two donkeys for added torque =D