I bought it from Overstock.com. 4 Inch memory foam in King size. I removed the padding from inside the original cushions and used them as templates to draw a line on the memory foam. I then cut the memory foam using a cerated bread knife, others on this board used a an electric knife. I even matched the angle of the cushion where it lies up against the bulkhead.
I actually bought 2 different versions. A 3lb density and a 4lb denisty. I kept the 4lb one for my bed at home and cut up the 3lb for the boat. I should have used the 4lb for the boat since it replaces the padding inside the cushion and the 3lb seems like it will bottom out. I'll probaly end up buying another 4lb pad to replace the 3lb one.
This the link for the 4lb version
http://www.overstock.com/Home-Garde...ory-Foam-Mattress-Topper/1657609/product.html
Link for 3lb version. (in case you want one for home)
http://www.overstock.com/Home-Garde...per-with-Contour-Pillows/2653504/product.html
Thanks a lot, I am going to order some.:thumbsup: