Looking for plastic fitting for fresh air element
 

I have searched online and visited a few Mercedes local dealers looking for a plastic fitting that attaches the Vacuum element to the fresh air flap/door. ALL the diagrams simply show thel vacuum element but nothing on this small plastic fitting. Anyone has any ideas as to what the part number may be or an alternative to hold the element to the door. The problem I am having is that is very difficult to access the element to rig an alternative. Without this fitting the vacuum element disconnects form the door when actuated. The part number for the vacuum element is: W0133-1619760. My car is a 1989 190E 2.6

I am updating just in case anyone else ever finds a need for the part. The number is 003-988-50-78. Th Mercedes Benz Classic team in California found it for me.