Simon I bought one on line from Binks for my Alfa GTV for about £200.00. A removeable bar one so when not in use you can take the ball bar off and stowe it in the boot and not spoil the Alfa look. I fitted it myself they said 2/3 hours work ?
But it took most of the day but got there in the end the electrics came with it but didn't fancy doing it so took it to a Guildford trailers and they connected it all up for £30.0 Righ Result works very well and a hiden when not in use. If you want can sedd you a picture.. Mark
I did get a quote from Bishops the main Alfa dealer in Guildford/Woking and they wanted £500.00 for the bar + about £400.00 to fit it ther servicing is just as expensive