We made the same decision yesterday Bob. Ordered a new custom foam topper yesterday. Slumber Ease is a local manufacturer here in Marysville wa. Their main product is custom mattresses for bed but they also sell the same for Boats , RVs , Chairs, etc. I spent an
hour talking to the owner Nick yesterday. He suggested that we go with a topper that is two different layers of foam of different stiffness. Hes going to layer the topper and cut to size. Foam in the last year has jumped up 140% in cost. So this is going to be about $300 cash. Not what I wanted to do but looks like what has to be done.
We had a two-layer mattress topper made locally for our boat. It was a great addition. We liked it so much we had one made for our pull-out guest bed at home. Sorry (but not surprised :?) to hear the cost has shot up!
Try hot soapy water with a cup of bleach per gallon of water . Saturate for 30 min or longer. Rinse well. Wring out as much water as soon as possible . Use a box fan on it in garage if possible . Finish drying in full water. Good luck
Need to check if items are bleach safe, too
If possible store items indoors when not in use.
Foam absorbs moisture