When I played, only for a little bit, pak128.Britian, I was amazed at how robust the industry is in comparison to standard pak128. One of the really fun things for me is figuring out how to keep from "dead heading" vehicles/trains/ships. So as much as I agree that there are enough goods going to super markets, it sure would be nice to have another route available.
One store that is popular here and has been for many years is the mini-mart. I think it actually replaced the old country store which allowed people to buy food essentials without having to ride/drive their horses/buggies all way to town. Maybe that would be a possibility?