Oh well, I have good news and bad news I guess. So I work for a company called VSCO, we've been doing a lot of film work in the digital space for years. We have a process where we physically model film's response to light in the spectral domain and it appears as presets in our app. Kodachrome is something I've wanted to do ever since we started practically, but it's obviously very difficult to develop. Unfortunately I can't go into much details about our development process, but I can say that it took 2 years and a lot of very talented, specialized people to get moderately decent results. It's definitely not something anyone could do at home, and even what we had was extremely difficult. It would take a few hours to develop a strip of like 4 frames by hand. So, Kodachrome is still dead, but we were able to develop enough to model it for our app. If you're interested, it's on both platforms to try for a week for free I believe. Sorry I don't have better news!