Our forum host offers URO Fan Clutch 103 200 0422 for the 1986-1993 300E, which has nothing but 5-star reviews on one of the big retail sites. https://www.pelicanparts.com/More_Info/UR1032000422.htm?pn=UR-103-200-0422&bt=Y&fs=0&SVSVSI=3303

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URO Parts online catalog: https://apaindustries.com/catalog