@artscaping Hi Chris. We have much in common regarding Neuropathic itch. Mine is relegated either to Diabetic and/or my Giant cell Arteritis.
For many months I suffered so badly that I had to take hot showers once or twice in the middle of the night, just to get some short-lived relief. I tried every type of lotion and cream to no avail, including corticosteroid creams prescribed by my doctors.
Lately, like you are doing, I've been replacing all my personal products. In desperation, I spoke to a very knowledgeable staff member of our local Healthyway Foods.
She recommended a product line that contains none of the "bad things" - parabens, sulphates (particularly Lauryl Sulphate), fragrance, etc. I tried sourcing "natural" products online, at great expensive, and with no luck. I'm sure you're well aware of these products with all the experience you've had with this crazy-making itch.
I've now replaced all my shampoo, conditioner, deodorant, toothpaste, soap, mouthwash, everything, all with the same brand name of Curelle. (I live in Canada.) After just a week, I can see improvement. I almost can't believe it. My doctors have been unable to help me with prescriptions or over the counter suggestions, as your experience has also shown.
My worse areas for itch were my lower legs and scalp. Those two drove me mad . My doc suggested Selsun Blue (I don't have dandruff! Help!) and I've also tried many types of hair products for itchy scalp, sensitive skin, hypoallergenic, etc.
In desperation, for my legs, I've been using coconut oil for the past two months, and just lately, I'm experiencing somewhat of a miracle. No more itch there. Also, the health food store products have helped already. No more scalp itch or allergic skin reactions.
You may already have tried these suggestions, Chris, but I offer them to you and others, just in case.
Take care.
Laurie