I don't really know what your problem is or where you live but Walmart here does not develop film. (that's in the Reality Galaxy)
I do know where Kodachrome is processed -- I never shot it so that doesn't matter.
I know of one roll film line in Indy that runs E-6. There used to be 4 pro labs that ran sheet film. They're gone due to digital -- ALL GONE. And no matter how much research has been done on film it did not stop that.
Also when I went to Brooks Institute and was in Color film technology classes we tracked the quality of various Kodak films over the years. And we found that just before a new film was introduced by them that the old film it replaced had a loss of speed. The new film would be up to speed. In essence the "new" films aren't much better than what was used in the fifties. There was nothing wrong with Panatomic X, Kodacolor or SuperXX. E-4 films were good until E6 came out.
I should also point out things like creating technologies like PhotoCD, Versamat, Disc Camera, 110, and others and then dropping support for them. If something looks unprofitable they will drop it.
The distance I would have to go to get sheet film developed is nearly the same distance as London to Paris. I would have to go to Chicago.
And what "PRO" would want to mail film out and tell the client it will take a week to get it back and the competitor down the street is shooting digital and offering "instant" results? It doesn't work on the commercial level and film is dead even if it may be better in many ways like dynamic range. It is dead because they want it dead. I don't see any Kodak commercials telling how wonderful film is and to go out and buy some film right now. They are not promoting it. Does the shutting down of the Kodachrome lines look like some kind of promotion to shoot Kodachrome?
It is disappointing since I have Sinar, Hasselblad, Art panorama film cameras. The last roll of film I had developed at the only lab I know of looked off speed -- too fast. So what is the point if the line isn't in control? Besides Photography is my job and not a hobby, they can shut down all the lines and I've gone Canon digital years ago and I will move up to MF with the CFV39 (Kodak sensor - wow surprise surprise).
I'm in the rural area outside of Indy and in the nearest town there is a negative roll film process running. But the proprietor told me he wouldn't develop any pro film because the line was out of control. I asked why and he said "not enough volume". Film will probably take its last breath in LA or NYC. The RED cameras are fast at work on replacing film for movies.
I suggest buying some stamps -- Russian probably -- to mail your film to Moscow in a few years.
BC