We are in process of purchasing a 2015 A.C.E. 27.1, it has what they are a "King Size" bed, one brochure lists the bed as 70" X 75" another lists it as 72" x 76".
I have done a couple of internet searches an I can't find any mattress manufacturer that makes that size, or any sheets for that size. Does anyone know what size it actually is?
When you find the exact size you can order custom sheets at Mattressinsider.com. They make custom mattresses,sheets, covers etc.
They made a custom mattress cover to fit the oddball size mattress in our Four Winds Siesta 24 SA and it fits great.
Hope this helps;