When I took delivery on my 2015 Fun Finder, one of the first things I did was order new foam for the dinette in a much higher density.
This place has darn good prices, including good shipping prices, and a great video showing you how to put the new foam in your old covers (plastic trash bags & vacuum cleaner). It worked great (although I still have a bit of the plastic trash bag on the inside...
Poke around their site - it's chock-full of good information:
https://buyfoam.com/default.aspxIf I recall correctly, the foam for the dinette, including shipping, was just under $100.