I answered my own question with a grand tour of a few local breakers. Item I needed (Passat wing-mirror plug and wiring) found also fitted to a late 90s Polo.I've never got the search function to work on my ETKA. Wouldn't mind some pointers Thanks
click the ATP tab and search in there. it'll give you the models and years but you'll have to do a bit more digging to figure out which trim levels apply where, using engine codes mostly.