Hi Moc Cock 8,
You can read a little more about the different ways of “matching” one mattress to another in post #9 here.
When you are looking for a mattress locally I would “measure” each mattress against a common set of criteria based on your testing rather than using a specific mattress as your “target” (see post #46 here). The only way to really know whether one mattress is a good “match” for another one (or your own specific criteria) is with your own personal testing and experience.
I would call each of the options listed on the list and tell them about your experiences and ask them if they have any memory foam mattresses that they believe would be somewhat comparable to what you like so you can test them and see how close they are for you.
I would also be a little cautious about how “cool” a gel memory foam mattress feels because how cool it feels to the touch may have little to do with how cool it sleeps over the course of the night. You can read a little more about the different types of gel materials and their effect on sleeping temperature in post #9 here and there is also more about the many factors that combine together to regulate sleeping temperature in post #2 here.
The tutorial post also has a link to several of the better online manufacturers and retailers that sell memory foam mattresses and many of these use widely available mattresses (including Tempurpedic and in many cases specifically the Tempurpedic Cloud Luxe) as a reference point for their design and “feel”. Some of these also have very good return policies as a “backup” in case your experience indicates that the mattress isn’t as good a “match” for you in terms of PPP as you hoped.
Phoenix