Stop Fibromyalgia Now

I have fibromyalgia and driving causes me a lot of pain, but my job requires a lot of driving. I can't seem to find a good car seat cushion to help. All the ergonomic (sp?) cushions seem to be for your back, not your butt, which is where my pain is. Any ideas? I'm already using support gloves for my hands and wrists so it doesn't hurt so much to keep my hands on the steering wheel, but my hip joints keep locking up.

Go and get some 'memory foam' cut it to size and sit on it while driving. If its good enough for NASA and Astronauts, reckon it will be good enough for you, unless you are pulling extra G Forces?