Damn, sorry to hear about that man. I live with chronic pain too and I know how bad it can wear on you mentally, and I probably don't have it 1/10 as bad as you. I really don't see why any reasonable doctor wouldn't sign your forms, anybody with half a brain knows it's healthier than taking 700mg morphine every day. You may want to consider vaporizing once you get a hold of something, your lungs will definately thank you. A Volcano is by far the best you can get, but they are quite expensive (probably looking at around $700). Also, marijuana and opiates potentiate each other, so the weed may actually help the morphine work more effectively.

Good luck in your search, I hope you find some MMJ soon.

Have a good one.