Why not just get a regular home mattress for your RV. Go to an 80 in length and you can byanythingyou would at home. Many of the majors make them in the short RV size as well but you have to ask as they usually don't advertise it. I know as i have been in the business for years and they have always been available. Another option is a custom shop or go to foan and just cut it to size with an electric knife. Remember a mattress is a personal preferance so whatever anyone tells you it is onlya advice. Just like all the best truck threads on the board. No real winner.