I don't know for sure if this is the correct Fuel Pump, though it does appear to be...I'm sure someone else will have the answer.
Rebuild kits are available; I've seen them listed in Mustang Parts Catalogs as well as eBay...be sure that you get a kit that is compatible with todays fuel containing Ethanol, otherwise the diaphragm and other soft parts will fail. In the '70's they started messing with Ethanol, called Gasohol back then, and ruined many a fuel system.
Ray