I wasn't able to get the 27mm bolt out of my 1972 350sl 4.5 crankshaft, and never got the timing case cover off the crankshaft. So I've got this big honking thing in my garage and haven't scrapped it yet. I hadn't seen the thing you are talking about, but now that I see you say it was damaged by the oil pump chain, maybe I can locate the part. I guess if it's really worth it, I could take this crank shaft I have to a shop and have them deploy some better tools on it to get the part you need. However, I would imagine it would be cheaper to buy new from MB.
Your other thread: http://www.benzworld.org/forums/showthread.php?t=2333929
Your other thread: http://www.benzworld.org/forums/showthread.php?t=2333929