Sorry, right now I'm out of state without my camper. They were still selling them recently. We also sleep lengthwise. They are now sold
at several retailers in an assortment of widths. They are about 2" to long, but being foam they will fit down in to place. I've said for years that I was going to en one up and take 2" off the length. My wife uses 2. 1 is enough for me.
Getting ready to replace the frame. it cracked at the front. l did a quick repair. I may rework the interior at the same time.