Good 15" 200 TW tires are going to be rare, the only thing I found was Nitto NT-01 in a very short 23" diameter or Hankook RS-4 in 225/45ZR15 at 22.7", way too squat for my taste. I like the stance/ look of my car with 225/60/15 at 25.6" diameter but alas I have come to the conclusion that if I want a decent 225-245 profile tire choice for street and a track set I'll need to get 16" wheels.
As Nailbender stated you'll need to stay 200TW (UTQG) or higher for most CAM-T classes. You can find a few in 16" 225/50ZR16 ~24.7" - 24.9":
Potenza RE-71R (one of the top autoX tires TMK currently)
Hankook RS-4 (don't know if they warm up fast enough for autox, I have the RS-3 and they're good for opentrack but don't get hot enough not to slide on a 1 minute autox I found)
Kumho V730