Be aware that new gaskets may not stop a fuel pump oil leak. I don't think you can buy the pump arm boot, and it is inside the pump itself, so only a new pump will fix an arm boot leak. Given that if the pump diaphragm fails, you will fill the crankcase with fuel and may have an unintentioned early 4th of July fireworks show featurning you and the swb, I'd buy a new mech pump...

Not responsible for advice not taken...