I need to replace the door gasket on my Jotul. I am having a hard time finding a phone number for Jotul to ask about the proper size to buy. Does anyone have a customer service number for them, or know the gasket size? The manual says to use a 11/32ld that is 5 feet long. I can only find 5/8 and 1/2 at the hardware store. I have no clue what the 11/32ld stands for that the manual is describing.