I have a missing rubber like bit on my driver side missing.
Driver Side Missing.
Passenger side not missing.
I've looked in ETKA but can't seem to find it. Can anybody shed some light on the part number ?
I think you're looking at the wrong diagram. You need to look at the one for the window frame.
I think the part you are looking for is 8P3 837 157 E which is for the passenger side (8P3 837 158 E is for the driver's side). Costs about a tenner.
Number 1 on this diagram...