That fuel line is not too cheap from the dealer, the only other place I know that sells it is Geno's garage. There was no indicators as to the impending failure. No clatter, no smoke, no gauge nor idiot lights so look out for it or just carry a spare.
Just a heads up like I said, I know there is one more out there with the similar 5.9 CRD.... Jerry
. Check the hold down clamp to see if it is coming loos from the line, not the head.