Replacement headlight mounting bolts?

[heartmys4]

I've been having a problem with the headlights in my allroad where no matter how many times I adjusted them, they would always end up pointing too high or low after a few days. I finally realized that the PO never reinstalled the 3rd bolt holding the headlight assembly in place, so it was free to pitch forward and backwards while driving.

Does anyone know the size of the lower bolt? Is it the same size as the upper bolts? Does anyone know where I can get a replacement?

For reference, it's the lower bolt pointed out in this article.

[mithril]

The top 2 are interchangible however the lower bolt is different (same size torx header but longer shaft). The part number for the bolt is: N 014 749 5 but may be superseded by N 011 666 15.