Well, the cost factor the 2AZ would be the best replacement, or if you want a V6 I think you would have to go with the 1MZ, but I am not sure if the transmission is the same, I don’t think it is but maybe someone else can confirm. The price of a 2GR would be prohibitive, not to mention if it would fit, by the time you changed it, it would be cheaper to buy another car.