"But, we were just saving you some money by replacing just the element. If you want us to also replace the fuel filter casing, that will be another $456.78."
I was thinking that same thing. But then again the MSM types aren't known for their intelligence.
Now if it's an "in-line filter" then I could see the whole thing being replaced, but the in tank types are usually a replaceable element. Some are even a fine wire mesh that can just be cleaned.