- leave it off (bad for aerodynamics)
- replace by identical part number (5C0 825 237 C)
- replace by identical part from other VAG-car (I'm in doubt about 1K0 825 237 and 3C0 825 237, see images below), to improve aerodynamics.
This is the broken part:

This is what it looks like when it's not broken (on the Jetta and Beetle, part number 5C0 825 237 C):

I assumed the MK5/6 GTI had the same plate (1K0 825 237), but upon close inspection, it didn't look the same, the 5C0 model has a notch on one side.. Here's the 1K0 (GTI) version, in the short and aerodynamic version, next to each other:


I continued my search, and found out the Passat (3C) does have the notch on one side... but the rest of the proportions seem to be off when I compare them in photoshop.
Passat version: (3C0 825 237):
So... I'm not completely sure what to do. I really want to have the "long" version of this plate, but so far, I haven't come to a conclusion if the 1K0 version will fit (with some Dremeling to have the "notch"), or if I should take the 3C0 version...
What to do?
(note: it's a Beetle
