No, I haven't.
To tell you the truth, I'm a bit burned out on new treatments, having spent the past 3 years helping to support the PN Treatment Industry, not to mention Amazon.
I've come to look at this somewhat simplistically. I know I have an anatomic defect (lack of small nerve fibers proven by skin biopsy). Until or unless those nerves grow back, I expect to have to deal with the pain. I don't believe much of anything will work more than a little in relieving the symptoms, including standard meds.
What I do believe will and does work is distraction and mindfulness, which almost anybody with this or other chronic pain syndromes can prove to themselves, by noting that when distracted, they can have a few moments being pain free. Everything is the same, but you don't notice the pain, because you're not paying attention to it. The opposite happens when things become bad enough to the point where the anxiety causes a hyper-awareness state, which leads to even more pain.
The hard part is training yourself to make those moments last longer. As usual, easier said than done. No magic bullet, just hard work.