I am restoring a 24' Fiberform "cabin cruiser" and have come up with a fuel tank question. Boat had a 75 gal. Tempo plastic tank installed in front of the sliding door which pretty much blocked access ( 16 inch step into the cabin sole ). I removed it and will install a 51 gal. Tempo plastic tank that will fit between the stringers. My problem is that the tank I obtained does not have the fill assembly installed. This was a combination fill / vent / gauge thingy that is attached to the tank with 6 screws. I cannot find a replacement anywhere. Any ideas?