custom fuel tank and reasonable in the same sentence, now that is a novel idea. I have been hunting for a while now and have not found one. http://www.rickstanks.com/ made one for a Dart for a brief while. they were used in the GSS Hemi cars. but they discontinued making them, when I spoke to them he said it was due to leaks. apparently once the drivers side of the tank is cut down the filler neck and its placement becomes an issue and causes leaks...