You might try calling this fellow in Oakland CA.He might either have or be able to locate an NOS one for you.He would surely have a good used one.He is one of the largest Mercedes only wreckers in California.

Welcome to Silver Star Motors and Silver Star Dismantlers! 65,000 square feet of nothing but Mercedes Benz cars and parts! Please call the shop for parts availability or questions. Thanks for taking a look!
Silver Star Motors & Silver Star Dismantlers
1727 17th Street
Oakland, Ca. 94607
510-834-1090
Monday through Thursday 8:00AM til 5:30PM
We are never open on Friday, Saturday, Sunday or holidays.