Does anybody know where i can get a fuel return line, other than Dodge or Cummins?? Also the "T", Fuel drain manifold? Also does anyone know if there is a check valve in the banjo fitting in the return line to the head?

As far as I know there is no check valve in the head (banjo bolt). But as for the line I would try a Cummins Dealer or a wrecking yard for the return line. Make sure to get new washers too!