Out of all the suggestions listed above, the only realistically viable setup is the one STYLSH has mentioned and even that would be in the $5000-$10000 range. RWD won't happen unless you have as much money as TRD USA. AWD, in theory could work, BUT there is no dedicated path under the floor pan to accomodate a prop shaft, or for a rear differential housing. The Klugers have a higher ground clearance than the Aurion as well as being designed for it to fit, so really costs would be just as high as a RWD setup with panel work etc.