I will try to locate the described chemicals at Sigma Catalog.
Or write them to a chemistry forum and learn the modern names of them.
Than learning the prices.
It walks step by step.
May be it would be possible to inkjet these two chemicals to the sides of transparent film.
Or applying with Dye Transfer Process.
I think dye transfer people would like to learn and use the original colors.
I love RG too much and fallen in love with the short Kodak movie . I would be happy to see them at my photography.