I recently bought a TON of great used items for my 79 300SD from a guy named Chris Fett in north Atlanta. He's got a BIG yard full of parts cars--lots of diesels too, from what I saw, and a building stocked with even more used parts. Very pleasant dude, too. His e-mail is:
torkadork@adelphia.net. He says he can ship stuff as well. Just thought I'd pass the info along to the rest of you home-wrenchers out there.
Mike