I'm in the same boat--I've tried the usual pharmaceuticals, supplements, Lidoderm patches, etc, and nothing has given me relief. Recently, a doctor asked me to consider a spinal cord stimulator, and so I am. Have you looked it to that option? If not, look here:
http://neurotalk.psychcentral.com/fo...ysprune=&f=118
I can't tell you it works as I haven't gotten one myself yet, but some people with PN have had good results. For the life of me, I don't understand why this option is hardly ever mentioned--I had never even heard of it until a few months ago.