Hi BorderGirl,
Latex is the most durable of all the foam materials and while it’s not a complete list … outside of any additional options that may be available to you locally some of the better innerspring/latex options I’m aware of are listed in post #2 here and the post it links to.
Some of the King Koil Extended Life series or the Therapedic Medicoil HD series may also be worth including in your research. Both King Koil here and Therapedic here have retail store locators on their site but you would need to call each one to find out whether they carry these lines.
I would keep in mind that while these may be durable enough choices … the only way to know for certain whether any of them will be a good “match” for you in terms of comfort, firmness, and PPP will be based on your own careful testing or your own personal experience and I would especially be cautious to avoid choosing a mattress that is too soft for you because it could be more risky both in terms of spinal alignment and in terms of durability.
I don’t keep a record of the individual mattresses or their specs that the retailers and manufacturers in the hundreds of forum lists throughout the forum carry on their floor or have available online (it would be a bigger job than anyone could keep up with in a constantly changing market) but checking their websites and especially making some preliminary phone calls to the retailers/manufacturers that are on the local lists that you are considering is always a good idea before you decide on which retailers or manufacturers you wish to deal with or visit anyway. This will tell you which of them carry mattresses that would meet your specific criteria, are transparent about the materials in their mattresses, and that carry the type of mattresses that you are interested in that are also in the budget range you are comfortable with. Once you have checked their websites and/or talked with the ones that interest you then you will be in a much better position to decide on the ones (if any) that you are most interested in considering or visiting based on the results of your preliminary research and conversations.
Phoenix