Can’t help re a fitter in your area but make sure they guarantee it’s compatible with all the electronics on the car and they fit one that doesn’t need the bumper cutting.
Solent Towbars mobile fitting. Used them recently and great service. They will supply almost any type to suit budget and also electric kits that are either vehicle specific or generic.
I'm a fan of the Westfalia removeable swan neck type as when removed there's nothing cluttering the rear of the car.