When K-II disappeared I tried various others, ending up mostly with Fujichrome 100. Agfachrome 64 was slightly faster than K-II but always seemed to lack definition. Fujichrome I liked for landscapes - greens, browns and yellows always seemed true. The nearest thing I found to K-II was gaf Anscochrome which for a while was available in one of the tourist shops where I was living at the time (1970ish, Aberfoyle). Sadly, when his stock ran out he never replaced it (too slow a seller) and I never came across it again. I seem to remember it was available in 100, 200 and 400 asa speeds which suited tthe available-light stuff I was trying to do.
Went digital a couple of years ago. I wonder how long it will take Photoshop et al to come up with plugins to replicate your favourite film? Or are they out there already