Hello, Gerry!
Thank you for thinking of me. I hope you are well.
Reporting back on the Morton's and general epsom salt situation:
We don't have Morton's or any epsom lotion where I live. (I am in Europe, but not in England. There are different customs and trends here, even as medications go.)
It looks like epsom salt is available as a laxative, and maybe for baths. If either of those are plain mag sulfate without other junk added, I could mix up a lotion myself, but, as you might imagine, that prospect does not enthrall me.
One thing we do have here, which I could not for the life of me find for a friend in the US, is a wide variety of NSAID-medicated bandages. I am using one with ketoprofen, 20mg. I've used it before for other things and it's very effective. It makes the shoulder pain milder/bearable. It's hard for me to believe that epsom salts would do better than that.
For milder or chronic afflictions, like my mother's arthritis in her fingers, I will look into finding plain epsom salt (it's called "English Salt" here) to use as a bath.
waves