Car has been discontinued for a few years. Tamiya America may still have some, as these were purchased before some BIG changes in personnel and how TA orders from Japan.
I have all the different versions of the EVO's, and each is better than the last. The IV was a great car, and could still be updated to be very competitve too. It was the first to have the lightweight suspension. The V was an update to the chassis and drivetrain components with the same suspension parts.
I currently run an EVO V non MS, and its very competive localy. I also have a 416. Kinda work back and forth to see if I can get each one better than the other, then race the better one.