Have you checked to see if any dealerships within say, a 500-mile radius has the vehicle you wish to buy? When we reserved our RX400h, we had to wait one year. Of course, it was well worth the wait.
Hopefully, you'll get a direct answer, but I am curious why you would not consider an ES300h. My sister has one and cannot be any happier, especially with its stellar gas mileage of 42 MPG average and up to 50 mpg on the highway.