Two answers here.

1. CD3, CD4 and CD6 can be made by a competent organic chemist or even by an ordinary person with the right starting materials and the right procedures. IIRC, CD6 is made from CD4, but it has been 30+ years since I worked on it.

2. Making a 3D scan of a B&W Kodachrome is dependant on having developed it in the proper B&W developer to get a good balance of curves in the imaging layers. It also will not properly represent the grain or sharpness, and lastly, its digital.