Morphine has been around for so long there is generic so may be very cheap to get. My pain center Dr. said that considering its ability to reduce pain it is worth it to try it (morphine). I'm no expert. Have you talked to your Dr. about it in depth? I would make sure there is nothing in the oral that will work before doing a pump. I've done most of what you've taken and finally hit on what works for me for now. Maybe talk to your doctor about different combos (which you probably have run the gamit on) I don't know. Good Luck! Susan