If I could ever get my hands on a set, I'd quickly dial the number of a few machine shops/engineer friends and have them reverse engineer and make a few sets for special order. Any one want to send a sample? Don't think it'd be too hard or even that expensive (relatively speaking of course). The chrome plating is the one thing that I don't know about...

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1982 240 D, 308,000 - 321,127 miles (sold)
1982 300 TD,166,500 - 226,000 miles
1998 E 320, 120,000 - 144,000 miles
2005 C 230 K, 26,000 - 77,000 miles (sold)