I found a provider in Blanding, Utah, and they even accept my insurance. I thought they were the ones that brought the concentrator to my house, but that was Alpine. The oxygen provider I'm dealing with now is Peterson Medical Supply, and I've spoken with Tracy Nielsen, who is very helpful. They will deliver oxygen to my home in Moab, which about 70 miles away.
I've found in my short experience that oxygen does stop the cluster headaches, but only for a short period. For instance, last night I had an attack around 11:00 pm, used oxygen, went back to sleep, and another attack around 2:00 am. Sumitriptan works better for me to completely knock it out; however I can't use it as often as needed due to potential of Medication Overuse Headaches. So . . . oxygen is a really great complement to medication for me.