Europa can look up the part number as well as obtain one for you. Their phone number is 1-888-538-7672. Don't be thrown when the receptionist answers "Don Chalmers Lincoln Saab". Just ask for G-wagen parts and she'll put you through. Also ask them if they have a used one available. Though their supply is dwindling, they do still ahve some used motors for parts around.
-Dave G.