Looks like the fuel tank in the '87 Formula 272 I am restoring is shot. It has an inch of sludge on the bottom, and has corrosion on the bottom from sitting in wet foam for years. My question is, is there a place I can buy a tank that will fit? Or do I have to have one custom made for big bucks? The original tank is 129 gallons, but I would like to go a little smaller, so it will fit better, maybe 100 gallons. Any advice is appreciated. Thanks.