I went through this same problem myself. The whole front section of the exhaust looked like it was available but this ended up being an easy and inexpensive fix. I don't remember exactly what size flex pipe section I got but it came from sladvanced mauto farts. One pipe slipped right into the inside diameter of the other. http://www.peachparts.com/shopforum/diesel-discussion/382714-something-happened-my-exhaust.html

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Current fleet
2006 E320 CDI
1992 300D - 5speed manual swapped

former members
1984 300D "Blues Mobile"

1978 300CD "El Toro"