X5 40d M Sport Towbar help

[Clubby]

Hi, I'm after a towbar for my X5 M Sport and I'm having no luck in finding someone who'll install one. Im getting heaps of excusses why they cant fit one. No of makes any sense to me. I thought all X5's were the same chassis with different bars.
The only option I can find is one that needs a great big chunk cut out of the bar for the hitch exit.
I've googled towbars and there seams to be options out there for this model but I can't find anyone.
Any help would be great.

I've thought about the Euro design towbars but the Ball down load max is 140kg. My trailer is 120kg. It is under but Im thinking it's a tad close.