Hi Souslpet2,
I had a chance to take a look at some of the options in the Colorado Springs and Salida area and this list that includes some of the better possibilities in the area (out of about two dozen stores or so). It also includes the brands that each one carries that I would focus on where you have better odds of being able to find out the specifics of what is in their mattresses.
Colorado Springs, CO. area:
Denver Mattress® - The Easiest Way to Get the Right Mattress Colorado Springs, Pueblo, CO. Local manufacturer that makes a range of innerspring mattresses and their iChoice model which is a mostly latex mattress that can also be used with either a memory foam or latex topper.
Choosing Mattress Comfort Levels | Bob's Discount Mattresses Colorado Springs. Therapedic (including gel), Easy Rest.
http://www.woodleys.com/ Colorado Springs, Centennial. Semaro (Therapedic licensee).
http://www.americanfurniture.com/ Colorado Springs. Carries Old West. Latex mattress is coming but they don’t have it on the floor yet. Said they would call Old West for foam specs. Check foam densities carefully here because they may be on the low side.
http://www.benfattis.com/ Pueblo, CO. Sherwood (incl. a latex hybrid). Will call Sherwood for foam specs.
http://www.pueblosleepsolutions.com/Home.html Pueblo, CO. Therapedic (incl gel and latex). Said they know foam densities “inside out”.
Salida, CO. area:
http://www.valleyhomefurnishings.com/Mattresses Salida, Buena Vista, CO. Restonic (didn’t talk with them to see which models or if they are willing to provide foam specs for their mattresses so make sure you call first).
For those that don’t mind a longer drive then the better options and possibilities I’m aware of in the Denver,CO and Boulder, CO areas are listed in post #2 here.
Phoenix