Actually the original 16v (201.034) came with a different part number, that later rolled to the EVO II (201.036) part number. Now all that's available is the EVO II part, 201-323-78-65. If you want to buy one, email the nice folks at
Speed Autoteile, at
Speed8467@aol.com , they can order it for you. This URL shows it is available:
http://wwwsg.daimlerchrysler.com/Projects/wi/cda/etpl?ETNR=A2013237865&from=query&etpl_lang=01
Cost from Speed will be ~$65 after discount & exchange US rates, but S&H will be pricey to the USA - probably another ~$75 USD. Might as well use a 124 bar instead, easier & cheaper to source, and fits with minor mods. Pick your 124 bar from this spreadsheet:
http://www.meimann.com/docs/mercedes/124_swaybars.pdf
HTH,