The source or site that is telling you that there is 5 different of each doesn't have the part numbers?

The main source is your dealers parts dept. Since these parts are not going to come here via VGA though, essentially it's a bit of a cat-and-mouse search/game. Look at other VW country sites and their accessories. Look at European parts suppliers and VW specialists. Even if something doesn't have pictures, keep note of the descriptions and piece the information together. Eventually you'll figure out what is most likely the correct parts.

Unfortunately, someone always has to go first. For this, it'll probably be you