Toma,

The lugnuts and bolts are available from both VW & Audi dealers. The problem
is usually cost. For example, I can get longer studs for the rears at $2 each
new frommy local parts palce. They are $9.98-$14.00 fro my VW dealer
depending on length. Porsche studs which are needed for use with some spacers
up front can cost up to $24 each. Aftermarket ones are available at $5 each.

Same story for lugbolts. The prices are about the same.

You also need to determine the type of lughole seat you have on your alloys.
Generally, Carat and SA VW factory alloys use a conical seat lughole. They do
this so that you can use the stock studs in the rear (fronts too in Syncros)
and just swap lugnuts. The conical seat nuts reach in further than the ball
seat variety. 2WD vans & Westies will also require the conical seat bolts up
front unless they have upgraded to the SA big brake kit which replace the
front rotor assembly with a separate hub with studs.

Still confused? Pmail me with your specific application and I can try to
assist.

BenT Wheel