You can use oem epc.
Find your car: try Golf/Variant/4Motion, then select the year.
You are then presented with the areas in the parts catalogue: Try Body.
http://www.oemepc.com/vw/parts_lst/markt/RDW/modell/GOLF/year/2002/hg/8/catalog/vw/drive_standart/266/lang/e
Scroll down (keep going!) and find "door trim".
Then have a rummage around until you find what you are after!
Switches are probably under the Electrics section...