Thank you very much for your kind offer, you are correct sellers frequently don't want to get involved in what they see as complication they can do without !
You probably would not believe that an alloy wheel is a prohibited item in most of the ' popular ' couriers items it will not carry ....why ? what possible risk can a wheel carry ? If you look at the list it's ridiculous they will soon have banned everything and they will all go out of business, the bonus being, the motorways won't be cluttered up with their half empty lorries !
Rant over, that's why I am in Crete.... but regrettably back for Xmas !
Steve