i am sorry if this topic has already been covered. i seem to have trouble with the search engine. i am currently trying to find a store to buy closed cell foam that is 1/2" - 1" thick to make a custom pad. i have checked lowes, home depot, and my local camp stores. i am hoping to find another way of getting it besides online order because i would assume the shipping costs would be excessive. does anyone have any suggestions on where to buy some?