Especially of interest to Houston-area and/or TX residents:
After getting sticker shock for a Southern mattress for our 17' SD (about $900 including the shipping), I called Texas Mattress Makers in Houston. Brought my cushions to the downtown location and they cut a template to fit.
Price for the same 8" mattress I would have ordered from Southern (5" foam, 2" memory foam, 1" quilted covering) was $399 plus tax. They had it ready in five business days. We are only about an hour away so I picked up the mattress. No shipping.
We're very happy with the product and the price! Slept like a baby for a week in Big Bend.