I've had a few people asking about these, and haven't got around to sending out replies to people, so thought I'd share the info I have in a thread.
The undrilled grille I had was no different to a drilled one in terms of part number, however the grilles do have numbers for each country:
ECE: 1K0.853.651.E
NAR: 1K0.853.651.F
USA: 1K0.853.651.H
JAP: 1K0.853.651.G
There are also unspecified ones as follows:
1K0.853.651.P
1K0.853.651.Q
1K0.853.651.T
My only thought is that it perhaps depends on the country code used, as to whether it is drilled or not?
If that's the case the best shot of getting one that isn't drilled would be to order a USA one?
Picture: