@chrisp that is the same tow bar and tongue part number as fitted to my sedan which i listed in post 9.
So it seems the tow bars and tongues used on both sedans and wagons are the same part. Maybe this wasn't always the case. This could then explain why the neck sticks out a little more when used in the wagon as it could be manufactured a little longer to also accomodate the sedan bumper. Using a common parts between sedans and wagons could then save on stocking spares now that manufactureing has stopped
@abuch47 you should be able to pick up all the genuine bits needed from a wreckers yars checp, just get thwem from a car that has had the front smashed and no side damage from a jackknifed trailer