Got one for my '92 201 from Patomac German Auto (they're an MB recycler) -- http://www.mbpartsonline.com
-- get the phone # from the web site, then ask for Pat. He's a member here. The one he sent me was in prestine condition, and even came with the original black vinyl cover. I'm thinking he charged me $10-$15, but don't quote me -- it was a while ago. I DO remember that the price and service were excellent! I've ordered from them a few times.
(EDIT - I inserted the wrong url for PGA. The address is now correct. Call the Maryland location to reach Pat)