Hi cjest,
I’m still not sure exactly where you are but it sounds like you are either North or East of Tallahassee. The forum lists that are closest would be for Tallahassee, FL here and next would be for Pensacola, FL here.
I did a quick look around Panama City, FL and there are a couple of dozen mattress stores in the area but I would only consider a few of them as possibilities (I’ve included other options as well besides just latex for others that may be in the area) …
http://www.fowhandfurniture.com/ Panama City, FL. Carry Englander (incl a 6" latex over polyfoam) and Golden (incl latex hybrids and gel memory foam) Family owned for 60 years.
http://www.visitsecond2none.com/bedroom/ Panama City, FL. Carry Golden but I didn’t talk with them so I don’t know if they carry their latex hybrids.
http://www.destinsleepcenter.com/ Destin, FL. mLily (imported memory foam) and Symbol but probably not any latex.
http://www.mattressoutletllc.com/index.php Miramar Beach, Pensacola, FL. Pure Latex Bliss, Therapedic (some of which may have latex).
http://www.dothansleepcenter.com/ Dothan, AL. Pure Latex Bliss
https://www.floridamattresscenters.com/index.html Pure Talalay Bliss and some memory foam.
Jamison Bedding also makes all latex mattresses and may have some retailers near you that carry them (see their retail store finder here)
Phoenix