For what it is worth to all of you, Ilfochrome is probably the easiest color material to duplicate in the home lab wiithout production equipment, of all of the color products manufactured today.

I have hand coated a work alike to Cibachrome back in the 70s with commonly available azo dyes selected from a catalog, and 3 spectrally sensitized emulsions. The big hit you will take is time making it, and on-easel speed.

So, if conventional materials vanish, and color is important, Ilfo/Ciba - chrome is probably the only one that will survive in the hands of the high end art or hobby photographic expert.