Hi dpastor,
There’s a bit more about “ultra premium” (I.e., more expensive) mattresses in post #2 here and post #2 here and post #2 here. Most of them will have dealer locators located on their web sites. There are also some “super premium” mattresses that use innersprings and natural fibers in their construction … some of which can go well into mid 5 figures. These include manufacturers such as VI Springs … Hastens … Savoir … Relyon … and Hypnos.
The better options or possibilities I’m aware of in and around the New York City are listed in post #2 here. Some of these retailers offer mattresses in the “ultra premium” range that you asked about. I don’t normally list retailers who only offer very high priced items on these lists, as they don’t usually represent the best values, so you’ll have to perform specific searches for any of the “ultra premium” brands on the web sites I linked to previously.
Phoenix