Volkswagen parts are available at various junkyards, though there is no absolute guarantee that any given junkyard carries the parts. Every junkyard has different inventory, so calling ahead is usually a good idea. Volkswagen autos are very popular, so finding a junkyard that carries Volkswagen parts should not be difficult.
Junkyards typically have a variety of vehicles available, though some specialize in specific vehicle brands. A couple of good resources for Volkswagen parts from junkyards are Car-Part.com and UNeedaPart.com. If one is comfortable taking the parts off of a junkyard vehicle, Pick n Pull might be the best option. Customers can find locations and inventory at PicknPull.com.