My mother is 64, has COPD and no health insurance, but does use an indian healh care. They have approved her to have the oxygen in the home. They gave her 3 bottles and a regulator. She has used all her oxygen in the bottles. They charge for more bottles and she cannot afford it. She is stuck at home. I can not even get her to the dr. As soon as she taken off home oxygen it drops fast. Is there a way to get filled bottles cheap or free?