I have a 25hp Johnson (J25ELCTD) and the stud that goes from the lower unit through an extension housing into the exhaust housing is broken. It is between 7 and 7-1/2 inches long and is part number 64 in most diagrams. It appears as if this part is obsolete and I'm hoping someone can help me find one or figure out a different way to attach these parts together. Any input is greatly appreciated.