You can try a Company in England called MORCO. ( They are listing separate Kodak chemicals for E6. 1st developer Colour developer Bleach and fixer etc etc.

You can buy 1 litre kits of E6 chemicals (3 bath) which will process up to 12 films. (35mm) However I should point out that at the present time I am in dispute with the company over a poorly printed set of instructions. I am sure the kits work but the method.times and temperatures are suspect. Morco also sell them.