Check out the 4Runner pictured in this thread. It's a 3rd gen w/ the newer 18" TRD wheels mounted on it. These are the TRD wheels offered for the 4th gens
(Picture of the wheels are towards the bottom of the page.):
There is a pic of those wheels on a 3rd gen on either here or yotatech. The backspacing is different so the wheels sit further inside the fenders - looks a bit goofy. Guess you could try them with spacers