I had a client with sciatic nerve pain, and some of the other symptoms you are poining out. We treated him with something called the htp heel seat. He particularly liked this treatment because it used acupressure to stop the pain as opposed to harsh alternatives. Can you list all of the symptoms you still experience?
Here is, in my patients words his experience with the htp heel seats. Below you will find a link to their website.
I've been using the HTP Heel Seat™ for the last 4 weeks and have experienced an almost miraculous recovery from the symptoms of my sciatic pain. Previous to using your product, I had used numerous other remedies including other orhthotic prophylactic products. Within 2 days of using your product, I began to feel relief.