The fuel injection line for my 1991 Mk2 GTD split. I managed to bodge a replacement from a transporter engine but that split too.
I'm looking for the original part so that it has the correct bend profile.
Have you verified that all 4 mounting bolts are tight? Usually the one at the back of the pump gets left loose and breaks lines.
I recently had the two in the block for the bracket get loose and my #2 line cracked - check all the bracket bolts too