Hi drm870,
This is much too broad a question to really be able to answer with any specifics because only you can feel what you feel on a mattress and there are too many unknowns, variables, and personal preferences involved for anyone to be able to recommend or suggest a specific mattress or manufacturer based on specs (either yours or a mattress), health conditions, individual circumstances, or “theory at a distance” (see mattress firmness/comfort levels in post #2 here).
I also don’t know the specifics of the mattresses you tested so there really isn’t a way to use them as a reference point but it’s very unlikely that you will be able to find an online mattress that “matches” a local mattress you tested that has the same materials and components and design although there may be many others that are also a good match for you in terms of PPP. For most people there would be many mattresses that would be a suitable choice even if they are different from each other.
In very general terms though if you are looking at an online mattress I would focus on the type of mattresses, materials, and components that your local testing indicates you tend to prefer (in the comfort layers and the support core) and make sure that the quality/durability of the materials is suitable for your body type.
There is more about the different ways to choose a mattress that is suitable for you (either locally or online) in post #2 here that can help you identify and minimize the risks involved with each of them.
Phoenix