Replacing the whole works!!!

If you have a pipe cutter and a flaring tool just go to your local jobber and buy a roll of whatever steel fuel line size you want. You also need a small pipe bender.I like the KD one. A little heat and the steel tube becomes much easier to bend.

You might try a mopar dealer for the filler tube grommet. The one on my m body was cracked and leaking fuel and I got a brand new one from the local dealership.

Summit,mancini etc for the sending unit.