The book and DVD are sold by me and by two other companies (Fotoimpex in Germany and The Photographers Formulary in the US). I have not tracked any of the sales. Just too much to do to ask others to send me names. Sorry.
As for color, it is very complex and I believe that Ilfochrome is more likely to be duplicated. In any event, Chris and I have not talked about color yet. Too much B&W to do first.