I don't know the official situation. I do know that I too miss this film. I have been using the 200 speed stuff for a while. Luckily, it is still readily available at local discount retailers and I cannot really see much difference between it and the 100 which is long gone from the local retailers.
Haven't tried Ektar. From what I've seen, I don't think I'd like the color response. Portra NC160 is too...dull for my tastes. Fujicolor HQ 200 is also nice, available and cheap.