This is in the color film section, so you basically have two options, Portra 400 or Fuji 400H, in the pro section. You could also shoot slides and use Provia 400. There are Kodak 400 and Fuji 400 consumer color neg films still as well. That's five or six options for you.
I am not familiar with the Rollei offerings, but someone more knowledgeable about those can reply to that.
Color film market is definitely not as extensive as it used to be. I used to love shooting Kodak E200 slide film pushed to 400 (this film was made for shooting from 200 to 800).