So got to the store today and think i found something that should work. Picked up some fiberglass pipe insulation which looks about the same. Only came in one size though so i now have enough to do the next 100 or so heaters i come across
Havent picked up any adhesive yet but its next on the list.
Anyone know of a source for the rubber gasket that seals the heater door to the body of the heater when the door isnt open into the cavity of the truck where the vent is?
Chooglin