As far as I know the 99-03 superduties all used the same degas bottle. Just call your local Ford dealer and ask the parts guy. Not sure I would waste money on a used one though!!!! The plastic get's old and brittle and will leak and your looking at one 9 years old?????? A new one is around $60, how much is your time worth, not to mention the loss of coolant when it goes? I would call Bob at
Ford Parts and Ford Diesel Parts at Powerstroke Shop and tell him Kevin sent you and see how much a new one is.
NCH