I have some ideas on this though regarding easier means to Kodachrome type results using B&W film. I would be interested in your source for Color Developers and your source for Couplers
PE ,

Do you aware presence of www.alibaba.com ? If not , have a look at there . I dont know what to look for but with your ability , I think you can find may be all of the chemicals. Dont miss it.

Best ,
Umut