[notsolo]

Dow foam comes in 4' x 8' sheets. Blue or pink...Get the thickness you need 1 1/2" maybe?. Probably won't be long enough but piece the ends, could do a 9' x 7' door for about $125. Cut it as tight to fit as possible, spray adhesive and or caulk. Razor knife and strait edge to cut....Also outside vinyl seal on sides and top....Welcome aboard...