How and where ( U.S and or Canada) could one order a medication that's not covered by insurance here in the U.S at a reasonable price?

Have you looked into the Partnership for prescription Assistance Program? You see Montel Williams advertising it and while I have not used it, one of my neighbors does and says it saves her quite a bit of money for some of her prescriptions. https://www.pparx.org/Intro.php There is a toll free number to call, they will ask you what medications and then tell you if it is covered. If it is covered, you will be sent a form to fill out and take to your doctor. Your doctor signs off, sends it in and there you go!