Mattress replacement Update::
I gave the salesman that sold our RV to us and has been an avid RVer for years a call. He recommended "Mattress Maker of New England". It is located in Brockton Ma. about 20 miles from our home. I called them and was told to bring our old mattress in and they would match the dimensions. We went there last week and my wife was able to pick out just what she wanted for firmness and coverings. (I can sleep on a board, so as long as she is happy all is good). Anyway, I picked it up yesterday and of course it fit perfectly and my wife is satisfied. It is a 6" firm mattress with a 1 3/4" custom cover. 10 year warranty.
cost us $475.00.
As always, a great thread.. Thanks to all!