What your saying does make sense, I will find some Epsom salts one way or another and give that a go.
In Epsom UK it's naturally occurring. Magnesium Sulphate Heptahydrate. We are falling over the stuff. It's in every big supermarket. All the health stores and the pharmacies. Garden centers. It's as common as rain. I think you will find some easier than you think but PM if you struggle. I'm good for it