Matt,

I had the same failure on my 300D 2 years ago. Somehow it cracked at the base of the line, right where the nut tightens it to the IP. You could order it from the dealer. I got mine for about $50.

__________________
Jason

00 Subaru Legacy (fun wagon)
96 Nissan Sentra (disavowed)
82 300SD (garage queen, will run again hopefully)
87 300DT (Gone: 10/15/2010)