I also got the option, if they will provide me a prescription, that my current supplier of parts, TheCPAPShop.com, will sell me a new ResMed machine.
My latest is the Air Sense 11 and I would not accept anything else the ResMed machines are what the VA contracts for and they have them in stock nationally. I don’t think you would have a problem with getting a Rx as long as you are going to pay for it yourself..