They're M5x16? And black.
Seems like 5mm in diameter is pretty fat, but if that's what they are...
You could order from a vendor like this (doesn't say what size torx, but it shouldn't matter much...but they only show 9 in stock):
But VW should be able to order them, even if they don't have them in stock.
While waiting for them, I'd temporarily install any black M5x16 screws that my local hardware store did carry, no matter what kind of head (phillips, etc.). They're not going to be visible.