Update: dealer installed the 119" WB fuel pump in my Expy Max. Good news: dealer checked the casting #s, the 119" & 131" are the same unit. Ford just assigns different part #s apparently. Truck runs great.
The BAD news: I have an 07 Expy Max. They redesigned the shape of the pump. The old flange was round, the new one is rectangular. He suspects this is to stop the swelling/warping in the plastic fuel tank. My install was not a straight drop in apparently. It was a very large bill for the several hours they spent modifying the tank to accept the new shape. Thankfully its a work truck so I can at least write off the expense.