Fuji still makes E6. I know it's not exactly the same thing, but the chemicals are out there somewhere.
That doesn't mean that Fuji's emulsions use the same sensitizers or dyes as Kodak does, note that their characteristics are quite different, and also don't forget that patents exist on many of these compounds to prevent copycat products. Add to that the fact that Fuji might well synthesize some of these compounds specifically for their own product line with no intention to jump start competitors.
Trying to be the best of whatever I am, even if what I am is no good.