valve spring need help with pic

does anyone know where i can get hold of 052109415 from its the spring that holds the valve

number 6 in this diagram

http://autopartmaster.com/en/?action=catalog_show&cat=vw&t_id=22103&id_pic=949&cod=N0101371

any help will be much appreciated

car is a 1.3 driver 1983

I have a few spare springs - PM me if you still need one...