Hi npfd,
The only suggestion I can make is to repeat my earlier suggestion which is to follow the steps in the tutorial post which has all the basic information, steps, and guidelines that can help you make the best possible choices and how to avoid the worst ones (including most of the ones you are considering). I would also make sure you also read the links that are included there as well as it seems that you may have missed many of them. It will also help you know which retailers or manufacturers are worth dealing with and which ones to avoid.
There is little point in testing mattresses where you know ahead of time you won’t be able to find out the information you need to make an informed choice or make meaningful comparisons.
You will also find a link there about the risks of using reviews as a way to make a mattress choice.
I would also take these kind of “marketing stories” with a big grain of salt. I have no idea why supplying hospitals has anything to do with why a mattress may be suitable for you.
Once you get to step 3 if you let me know your city or zip code I’d be happy to let you know of any of the options or “possibilities” I’m aware of in your area.
Phoenix