Why I suggest a career change for whomever looked (just barely) that water pump up....
Nobody knows everything but to be a good parts person you need to have an interest, be willing to ask questions and have some pride in what you do. Stopping at the first result is un-acceptable. Could have asked for help, listened to the little voice in their head that should have been saying "They MUST offer a water pump for this engine", etc....
Instead just gives the equivalent of a shrug by saying "It's no longer available"....that person will cost that company some big money at some point....
That crap doesn't hold up very long in the truck and engine business.....