Axle Flange Gasket

Ok, so like i put the rearend back in and stuff, but didnt put the axles in cuz i didnt have the axle flange gaskets. well now i need them, and i've gone to several parts stores, all having to special order them. anyone know where to get them or like the part number or specs or anything. because napa needed the specs of them. do i even need the gaskets??? thanks. dave