Hi Rae,
The closest manufacturer direct outlets to you that I know of are these …
https://www.foxmattress.com/ Holly Hill, FL (Recommended and a member of this site)
http://www.orlandomattresscompany.com/ Orlando, FL
Find an Original Mattress Factory Store Kissimmee, Orlando area, FL
Furniture Row® Store Locations - Store Hours & Addresses Daytona, FL
http://www.palmbeachmattress.com/ West Palm Beach, FL
http://schraderbeds.com/ West Palm Beach, FL
Of these … the closest and the one that I would recommend (because I know them best and think very highly of them) is Fox Mattress. Rick is very knowledgeable about materials and construction and how to fit a mattress to an individual and also offers great value which is why I invited him to become a member here.
While it is a bit of a drive … working with someone who knows their stuff can save hours of research into what type of mattress is suitable for you and then finding an outlet who will actually tell you what is in their mattress … layer by layer … and knows how different materials and layering combinations can work together to your benefit and which types of materials provide the best value.
ADDED Sept, 2013:
I did some local research and for those in the general area that are looking for something more local this is the list of the better options and possibilities in the area (out of over 40 retailers and chain stores in the area) and the brands they carry that I would focus on (that have better odds of being able to provide you with the quality of the materials inside their mattresses). They have all (except one) told me that they would provide the specs of the mattresses listed.
Redirecting... Melbourne, FL. Biscayne Bedding incl. latex, latex / innerspring hybrid, and gel memory foam (their website was down when I last looked but they are still open).
Melbourne, FL. I called them and they told me that they are a small manufacturer that makes innerspring mattresses (including two sided) on the premises and sell mainly through Craigs List. I was originally happy to find a small local manufacturer but when I told them about my site and asked them about the range of foam densities that they use they refused to tell me, told me that they had another customer, and when I asked again hung up the phone on me and blocked my number so I couldn’t call back. I would be very cautious about going here and unlike other smaller manufacturers they certainly don’t appear to be very open about the quality of the mattresses that they make.
http://www.kanesfurniture.com/ Melbourne, FL. Therapedic (incl Gel memory foam but no latex).
mattressmark.com/ Indian Harbour Beach, FL. Pure Latex Bliss latex (latex)
http://mattressmarket.org/ Jensen Beach, Vero Beach. Classic Brands, Pure Latex Bliss.
organicmattresshaven.com/ Savvy Rest latex component latex mattresses and Magniflex memory foam mattresses.
https://www.atlanticwholesalefurniture.com/ Palm Bay, FL. mLily (memory foam), Symbol (incl gel memory foam and latex hybrid).
jimsearsfurniture.com/ Merritt Island, FL. Carries Biscayne Bedding (incl 2 latex mattresses) and Consolidated Bedding. Knowledgeable about materials and will get specs from both Biscayne and Consolidated.
Mims, FL. Carries Jamison (incl latex and gel memory foam), and Bed boss (memory foam) and will call the factory for foam specs on both.
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Overall IMO … if there is a quality independent manufacturer that provides good value within 100 miles or so of where someone lives … then it can almost always save time, money, and frustration … to go there and do both your testing and purchasing in one place with the guidance of someone who can be trusted and knows their stuff but there are also some local choices with more knowledgeable staff that would be worth visiting as well. When you are dealing with retailers or manufacturers that will provide you with the specifics of what is in their mattresses and have the knowledge to help educate you instead of “sell” you then you can make much more informed choices and make meaningful quality and value comparisons between mattresses.
Hope this helps
Phoenix