kinda in the same boat,,I went to autozone and bought fuel injection line,,the kind that the outside looks like regular rubber fuel line,,,but with a funky blue rubber? inner lining on top of it,, it aint cheap at 4 bucks a foot ,,,but it's supposed to standup to any kinda gas and used it for the connections between the real lines and filter , gas tank and line to fuel pump,,,,was having issues with the rubber showing up in the filter and carb bowl,,,not any more though,,,,just an idea/thought