Jeler, what is your current O2 status? (And your overall status?)
I had a pretty nice series of exchanges with that person at the Iowa regulatory board. S/he seemed authentically concerned, and made whatever suggestions s/he could come up with from staff. (The name of the person I corresponded with could be a man's or a woman's, so I don't know.) The suggestions aren't very helpful -- try a big supplier like Airgas because they are also a wholesaler and would have larger tanks on hand; ask the prescribing doctor to specify either large tanks or a large number of small tanks; consider a concentrator. If you've done all that and you want another step, I had the feeling that maybe that person might try to exert some influence directly with a supplier. Just a small feeling I had. Of course, if your problem is solved and you don't want to think about it any more, that's fine.
I guess I would say that my interaction with that person from the board was a lot better than I had expected it to be.