Seems I have a fuel leak in one of the lines

I haven't had a chance to drop the tank and look for exactly where but the small fuel puddle is forming under the rear driver's side door and the frame looks wet so I'm GUESSING its the line. Is there any problem replacing the metal lines with high pressure (fuel rated) rubber hose? I really don't have the time or coin to replumb the entire fuel line system (IF I can even find one)

 

Contact this guy and see if he will make you a piece from the filter back with the correct fittings. Mine went in the same spot. I re-did mine with copper. I did not see any way of putting the OEM line in without taking the body of the truck off.
GM Chevy GMC Pick Up Suburban Yukon Tahoe Fuel Lines | eBay

 

I didn't even think about copper. And I was pretty sure ther is no way to run OEM easily... That's why I was thinking rubber from where it goes from nylon to the fuel filter