Hi Mike Jones,
Select Foam has a bricks and mortar store in Florida called Brickell Mattress. This is the only other place they are available.
In case you haven’t seen this … there is a list of some of the better options in the Huntsville area in post #2 here.
You can get very close to your long term needs and preferences if you spend at least 15 minutes fully relaxed on any mattress you are seriously considering and with careful and more specific testing. This article may be helpful for testing for pressure relief and this article along with post #11 here with testing for alignment … especially with some good guidance from a better retailer or manufacturer.
In the case of Select Foam however you at least have the assurance of knowing that the mattress can be returned if it doesn’t work out although I would still do my best to differentiate between them (using the local Tempurpedics) because it’s still a “job” to return a mattress even if the return is free.
The guidelines I use for memory foam mattress are listed in post #10 here.
They don’t meet the guidelines so I would pass them by. For me it really is as simple as that 
While I tend to prefer local purchases when possible when the “local premium” compared to similar online choices isn’t too high (I usually use a guideline of 20% or so depending on people’s risk tolerance) online retailers or manufacturers can be a good value reference point or purchase option in areas where there is little in the way of similar quality and value available. Some of the better online sources for memory foam mattresses I’m aware of are in post #12 here (although of course this is not an all inclusive list).
I pay little attention to “comfort reviews” except as a very general comfort indication based on clear “patterns” that may have no relevance to any particular individual. I also pay little attention to reviews that are mostly about someone’s initial excitement about the “deal” they think they got with little consideration to the actual quality of a mattress or the materials that are in it. Even the cheapest materials can feel great initially … they just don’t last and if a mattress isn’t suitable for the needs and preferences of a particular individual than anything you have spent on it … no matter what it’s quality or value … is money wasted.
You can read more about my thoughts on reviews and what they can be useful for and what they aren’t in post #4 here.
I think that there are 3 main issues in the industry today that are the main contributors to its current sorry and confusing state. The first is lack of transparency and meaningful information about mattresses and the materials and components they contain. The second is the “race to the bottom” that includes retailers that know little about mattresses and are just in business to make a quick profit regardless of how they do it or what they say. The third is overcharging for mattresses based on proprietary or marketing “stories” that have little facts behind them and that use materials that belong in mattresses that should be selling for much lower prices. I tend to avoid all of these and hopefully provide the information that can help others to do the same or at least help them connect with the manufacturers and retailers that don’t fit in any of these groups.
Phoenix