Hi MarinaMist,
The better options or possibilities I’m aware of in and around the Cleveland area are listed in post #2 here. There are a number of “mostly latex” mattresses but I’m not sure if any of them carry an all latex mattress so you would need to make a few calls to confirm what they carry on their floor.
Some of the other forum lists that are a little further away from you are in post #6 here.
The mattress shopping tutorial also includes a link to this post which includes a list of all the members here that sell online and many of these make all latex mattresses that use all the different types and blends of latex that include many different designs, options, features, and budget ranges that would all be well worth considering depending on the parts of your personal value equation that are most important to you.
Phoenix