I think you have tried a lot and want something unusual but good.
I suggest items you can have shipped from Europe.
I recommend NutraLenk Gold from Iceland.
Do not be confused by products named NutriGold or NutraLenk Gold from Denmark, etc. Here is a website for NutraLenk Gold from Iceland:
NutriLenk Gold fyrir lidina 180 toflur | Lyfjaver
Google will translate this website.
They will ship here. It is about $50 for a two month supply, but the shipping charges will add quite a bit to this. Plus, the 2-3 weeks you should take 2 tablets 3 times a day, then you cut back to 2-3 tablets a day (so it costs a little more for the first 2-3 weeks.)
You must order two bottles and pay $25 shipping, so about $125 for a four month supply.
You won't feel a difference immediately, but within a month or two there is a great difference.
This worked wonders for me where nothing else did very much.
Additionally, as others have said, I strongly recommend Dr. Sullivan of the Villages Healthcare.
Finally, physical therapy implementing the right exercise program has the potential to make a huge difference. You do have to find a good physical therapist (I visited with one in Europe and so have no one to recommend here.)