1998 GMC Yukon 4x4. My fuel pump ring thingy holders have rotten and the pump sticks up now. When I go to fill the tank the gas pours out of the top. It is an original plastic tank mounted on the side. I can't find another plastic tank and the parts places tell me I have to get a metal one. When i look for a replacement tank all i get is the rear mounted one. Does anyone know the part number for the side mounted tank? Thanks