bubbasleep,
Subject to first confirming that any retailer or manufacturer on the list that you wish to visit is completely transparent (see this article) and to making sure that any mattress you are considering meets the quality/value guidelines here … the better options or possibilities I’m aware of in and around the Columbus, GA area are listed in post #2 here.
The closest factory direct manufacturers I’m aware of would be in the Atlanta, GA list here or in the Birmingham, AL list here.
My username is from the mythical “phoenix” bird rather than the city but I’ve been to Phoenix a couple of times (although it was long ago) and a few of the members of the site are based there as well. My biggest memory of Phoenix was how hot it was 
Phoenix