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Yup, just bought some from:https://shop.millermbz.com/parts-catalogs/w113-br-230sl-250sl-280sl-br-1963-1971/drivetrain/suspension/front-suspension/4795/113-urethane-suspension-kit-earlyI didn't buy the whole kit (trailing arm bushings, etc.). I'll do that later.
Crap! The guy on ebay said they can't find the part!So I'm still in the hunt for one.