Transmission Control Module on 1993 Mercedes-Benz 300D

Where can I buy a Transmission Control Module for Mercedes Benz e300D 1997 Body # WDB-JF-20F-6V-JO-334-43,
Part # 021-545-04-32 and what is the price range?

Asked by for the 1993 Mercedes-Benz 300D
call around junk yards otherwise call a dealership. Cost is what ever the cost is.