Hi jet551,
Only memory foam really “feels like” memory foam but I’m guessing that you may be talking about “slow recovery latex” which has some similarities to memory foam because it also has a slow recovery recovery time and low resilience like memory foam. Arizona Premium sells it here.
I would keep in mind though that it’s a blend of synthetic and natural latex so it’s certainly not “all natural” and that it will likely feel firmer than most memory foams.
There is also more information about choosing a topper in post #2 here and the topper guidelines it links to which along with a conversation with a reliable supplier that can provide you with good information about how their toppers compare to each other or to other toppers they are familiar with that are available on the market can help you use your sleeping experience as a reference point and guideline to help you choose the type, thickness, and firmness for a topper that has the least possible risk and the best chance for success. It also includes a link to a list of some of the better online sources for toppers I’m aware of as well.
Phoenix