Well, we just ordered our first set for a customer in 18/19. Sizes are going to be a 245/40/18 front, and a 275/35/19 rear. I will post pictures when they come in....
Sorry they are not making the 245/45/17.... maybe then run their 555's if you are not going to move up to an 18". If you look at it from Nitto's point of view, they still make a lot of sizes in the 555s that work in 17s and there is certainly nothing wrong with the 555.