Hi shell,
There are only 3 ways to choose a mattress.
The first one is generally the least risky which is based on your own careful and objective personal testing (see post #4 here).
The second one is if you are purchasing a mattress from an online retailer or manufacturer that you can’t test in person before a purchase which would involve a more detailed conversation on the phone with the retailer or manufacturer you are considering. They will always be your best source of guidance about their own mattresses and the options they have available.
The final way would be if you are designing and building your own mattress from individual components and a cover that you purchase separately and for those who are considering this I would make sure to read option 3 in post #15 here (and the posts it links to) to make sure you have realistic expectations of the learning curve, trial and error, and in some cases the additional costs that may be involved if you make any “mistakes” in your initial layer choices and they can’t be exchanged or returned.
If finding a suitable mattress is particularly challenging for you because you have an unusual body type or heath considerations or because you have a narrower range of mattresses that would be suitable for you in terms of PPP than most people then zoning may be a good option to consider.
It sounds like you may have seen this already but the better options or possibilities I’m aware of in the Asheville, NC area are listed in post #4 here.
This is more the norm than the exception in the industry because ILD’s are “comfort specs” that many manufacturers wish to keep proprietary because they have little to do with the quality of the materials and aren’t important to know when you are testing a local mattress because your body will tell you much more than the ILD’s whether a mattress is a good match for you and if they release the “comfort specs” then they would be opening the door for their potential customers to try duplicate the layers and components of their mattresses (which may or may not be successful) which may cost them business that they would rather have themselves.
Unfortunately as I mentioned in my last reply, there are too many unknowns and variables and personal preferences involved for anyone to make specific suggestions or recommendations based on specs (either yours or a mattress).
I’m happy to help with “how” to choose but the specifics of “what” to choose are always up to each person’s careful testing or a more detailed conversation with an online manufacturer.
Phoenix