Dye bleach is the most do-able of all of them and most of the materials (dyes and chemicals) are commercially available.
You will need Solantine Yellow, Solantine Pink and Chicago Blue as your 3 dyes for starters. The Chicago Blue is too short in wavelength but will make a respectable picture. You will need the 3 emulsions with 3 sensitizers. You will need a special yellow dye for the filter layer or you will need to make Cary Lea Silver as the yellow filter. You will need a mordant or a method of mordanting. I am working on this.
You will need an interlayer scavenger, and I'm working on this problem right now. It is also an chemical used in the layers and in the bleach to sharpen the image and reduce crosstalk.
You will need Ammonium Bromide, Sulfuric Acid, Thiourea and Phenazine for the dye bleach or variations on this mix.
You work from the bottom up coating and refining the cyan layer first, then the magenta + interlayer. Then you add the CLS layer on top to insure that there is no blue light exposure, and finally you coat the yellow imaging layer. You will find that due to the peculiarities of Dye Bleach that the image is sharp but very grainy and the grain pattern is the opposite of E6 films.
This is similar to Gasparcolor and Ilfochrome. Kodachrome did not use a dye bleach per se, but rather a dye formation / destruction process in the first version that was not imagewise in the bleach step.