Nice and quick mod, part numbers are:
4D0 823 732 D
4D0 823 731 D
These are used on the diesel D2's to keep the engine noise as low as possible
They also makes the bonnet shut a lot nicer.
Thanks to MJ for the original idea
They tend to be available in european countries where diesels were available. Send Spanker a PM, he may know something or know where to source them from.