When I tried a Hose from the Auto Parts Store it lasted 2 weaks and the Fuel ate through it. If you want what might be a local source NAPA sells the real Return Line Hose as does the VW Dealer for the Old VW Rabbit Diesels.
From my Notes:
Where to buy fuel return hose VW RAbbit
http://www.peachparts.com/shopforum/showthread.php?t=238219&highlight=Rabbit
The Thread with the part numbers
http://www.peachparts.com/shopforum/showthread.php?t=210922&highlight=return+line+part+number