I don't see any indication that there is any c41 film > 800 ISO that is still being manufactured anywhere. As I said in my initial post, Fuji Press 1600 was the last 1600 speed C41 film being made, and that was discontinued years ago.
Porta is very expensive film. I think I'm going to buy a lot of Supra Xtra 800 and see if I can get it a stop or more. That stuff sells for ~$3-4 a roll.