WEOlson, There used to be order form on first page but there doesn't seem to be one on new issues. You can contact TDR at 770-886-8877.
Going after the return fuel line is pretty straight forward.
Doing from top of engine. 1. remove fuel filter (be a good time to put new one on). 2. Using screw driver or socket/rachett undo srew clamp. pull/twist hose off metal line, unbolt bracket that holds return hose and metal supply line. 3. Using srew driver or socket/rachett/wrench remove srew clamp(located by transmission bell housing), pull/twist hose off (This mite be easier from bottom depending how long your arms are and if it is 2wd or 4wd).
Replace hose by reversing removal procedure.
Marine rated hose for diesel seems to be the way to go (state of art). You can get this at boat shop or from Larry B's (member).
I have replaced return fuel line hose twice next time I will go state of art.