Craig, I am assuming you are Rocketman's Dad?
Welcome anyway.
First of all I really cant help you with specific doctors in your area, unless they are on the medical practitioners link on the left.
Re the prescribing oxygen. You dont need to get a prescription per se.
But first of all that means to me that possibly your doctor does not have an understanding of the need for oxygen for someone with cluster headaches.
Why not trial oxygen first at a local ER room. I dont know what is local to your area, or if you can go to a hospital or not. Check the O2 treatment link on the left.
The getting of the oxygen is not a problem in reality. I suggest you contact the BOC agent in your area for some assistance. The number we have as a contact is 1800 050 999. Try them. If you do not get enough assistance from them, please come back to me. All you should need from a doctor is a "note" saying you require oxygen. Follow the guidance on the link. This will not be a prescription. It will cost you. But it is not an arm or a leg.
I feel your son, this is a very distressing illness--he does need some help, and from a GP who understands what CHs are all about. This may mean searching your area. You may need to do the old ring around first to ask if the GPs are familiar with dealing with patients with CHs before your front up to save some mileage. You do develop a front bigger that David Jones for this type of thing I can assure you!
Also not sure of how diagnosis has been ascertained. Has he been seen by a neurologist?? Who made the diagnosis and how?
Please remember we are not medicos here, just fellow sufferers just trying to lend a helping hand.
First be sure of diagnosis, second find doctor who can really help who knows what doing.
Good luck
Heather