Hi Kr,
Some of the better options and possibilities in the Houston area are listed in post #2 here.
A few phone calls can clarify what each of them have on their floor in the way of latex that you can test.
I completely agree with this. Without a reference point of your own experience, it’s very difficult to “translate” someone else’s description of their subjective experience on a mattress or material in a way that is accurate or even meaningful to someone else.
Phoenix