I've been to collect parts from them, they are in Leeds. I was at first concerned as the phone number and address is the same as this
https://www.healthestatejournal.com/...erne-doors-ltd
and they also go under this name
https://www.mg-rover.com/home
when I went there ( few yr ago now) it was not well signed but genuine enough people and place
and they advertise a good range of OEM stuff