I have a bag of plastic 35mm film cans in my garage. When I get a cartridge with no box, I pop it in one of these nose first, followed by a small cube of foam to stop movement. Just position the cartridge so that the stylus is away from the opposites side of the film can and all will be well. I have about half a dozen stored this way at the moment. Been doing this for best part of forty years. Works for me. You can get old film cans on eBay.
It is impossible for anything digital to sound analogue, because it isn't analogue!