Some time ago someone posted a file from Ian Mazursky at PrePress Express about splitting either the Kodak E6 or the C41 chems, I cannot remember which one. I've been in touch with him off and on over the months, and he has done us all a service by gathering all the details into two spreadsheets - one for C41 and one for E6 - about how to split the dizzying array of Kodak chemicals into useful quantities. According to Ian this has been reviewed by Kodak and given the green light.
Mind you this is not how to get a 1L or 2L kit. It's the bulk stuff they sell now, which is a boatload of chemistry to buy. This is instructions on how to actually use the stuff in small quantities once you figure out a place that will sell it and ship it to you. And no comment about whether the ratios work for other vendor's chemicals. Don't count on it.
The two spreadsheets are on Ian's download page here: http://www.prepressexpress.com/pages...downloads.html
They are about halfway down under the photography tag.
The direct links are: