I have a brand new one that I bought for my jtd 'wagon a while ago. As it looks likely that I will be selling the car before I get round to fitting the towbar I could be willing to sell it. It is one of the Bosal detachable one which cost me a fair bit of money. I seem to remember it costing well over 230 notes.
The only slight problem might be that I have a 2004 156 which might be different. If it would fit I could let you have it for £150.