I'm FT in my travel trailer too David! I know how frustrating it is to find a replacement mattress. I just had an 8" memory foam mattress made by a company in Utah called Rocky Mountain Mattress. I had my choice of thickness, material, construction, and mattress covers all as standard features! It was a fantastic experience that they made practically effortless for me AND their price beat making it myself! The finished product came in a box I could handle myself and it is just as beautiful and professional as anything you see in a mattress store. I am still amazed with it's comfort and how sound I FINALLY sleep! These folks at Rocky Mountain mattress had it shipped to me in less than 2 weeks! How great is that for a custom made mattress??? RMM Rocks!
Fabulous Florida Keys