Have you tried the dealership?
I've been buying lots of fasteners for my project - they can usually get them still and their prices are typically not bad.
Yeah, they are pretty cheap, I'd rather give a few bucks to another enthusiast if I can though.
I've had good luck with 1stvwparts for actual dealer stuff the last couple times I needed em.
Yup, I've bought a bunch from 1stvwparts. They are actually just a regular old dealership who happens to have a parts department that's willing to sell online - they are located in WA, the dealership is Auburn Volkswagen.