Recommendations for a towbar (and fitter) in the far North, please?

We want to fit a towbar, and had an ex-Skoda independent lined up to do the job, but he's now changed jobs and can no longer do it.  Would anyone have any recommendations:

(a) for a make of towbar and;

(b) a fitter - ideally in North West Cumbria, but I appreciate that's a big ask.  We'd be willing to travel to (say) Newcastle, Manchester or Liverpool - or indeed Glasgow.

Ideally, I'd like something that didn't get in the field of view of the rear parking sensors.  Mostly, it will only have a bike rack on it, or a small dinghy on an unbraked trailer, so I'm not too bothered that it hasn't had the cooling system mods.  However, it would need the wiring and dedicated electronics.  I'd happily have a go at the hardware myself, but don't have any equipment to "code" it to the car's software.