1996 door hinges welded not bolted

[010175]

My door hinges are spot welded on to the door not bolted. The drives side door is sagging with new pins and bushing. The door has some up and down movement between the door frame skin and the top hinge. I think the top spot weld has broken loose. Is their a plate inside the door skin so I can have a weld bead ran a long the top of the hinge? Is there wires or something melt able inside that area? Thanks Dave