Hmm. Do you have that from a reliable source at Eastman? Keeping 5285, for which there is a tiny market, after discontinuing the 135 version (same film, only different sprocket holes and different packaging) makes no sense in Kodak's current predicament - they have to do what is necessary to survive, and concentrate on the strong-selling films. Maybe they simply haven't announced the end of 5285 etc manufacture.
"Due to a steady decrease in sales and customer usage, combined with highly complex product formulation and manufacturing processes, Kodak is discontinuing three EKTACHROME (color reversal) Films:
KODAK PROFESSIONAL EKTACHROME E100G Film
KODAK PROFESSIONAL EKTACHROME E100VS Film
KODAK PROFESSIONAL ELITE Chrome Extra Color 100 Film"
Kodak would be crazy to manufacture Ektachrome and not sell it to as many customers as possible - it's the film manufacture that is difficult, not slicing it up and poking little holes in it. I tried phoning my contact in the Motion Picture division, but could not get through today - their customer service is not what it was, even for those of us who spend tens of thousands of dollars a year on their film.