Originally Posted by
Bargegeek
If you're feeling handy, you could buy the Mercedes Benz part # 170-727-03-30 and try grafting your upper piece onto that with weatherstripping glue. (The inner sheet metal of the doors and miscellaneous other door pieces are common between our Crossfire and the SLK320.)
You can find that part
here, in case you care to try it.
On the site you refer us to it would be part 4 on the third diagram. It’s the outer half of the mopar part. I will have them both in a few days and do some closeup comparison. If the metal door of both SLK and Crossfire are the same it may fit by splicing the two. However once on the car it may not have the identical look as the mopar part. Hard to notice as it will be on opposite side of your car.