I know that the ZRT saliva/hormone tests advise not taking the "steroid" vitamin D prior to the test period.
Given her symptoms, I would wager quite a bit that she is cortisol deficient. I tried quite a few things to improve my own adrenal function - and if high-dose vitamin C doesn't work (it might in your wife's case) - you need to find a supply of hydrocortisone. (However, coincidentally I am discovering that there is a world shortage - either real, or contrived to raise the price.)
It is strange, I might be able to get a prescription from Canada - much cheaper - than you can. We are not going to be able to fix Canadian healthcare, but at least you probably know what her issue is. That is always the first step.
There is a doctor I know, in the USA, who you could make an appointment with, and I don't see why he couldn't write a USA prescription for cortisol, especially if you had the results of an Amazon ZRT all-day cortisol test. This would cost less than $200 USD - plus the airfare/motel, plus the cost of the prescription, which until now, has been very cheap. You could go home with at least a six month supply... Assuming cortisol is still available at some pharmacy...
Owen R. Fonorow, Follow #OWENRFONOROW at twitter