Hi, they are based in Leyland, outside Preston
I have been inside one once as it was on display outside Derby House and the quality looked superb to be honest, but I was only being nosey and had a quick look
My middle sis has just had some work done by them to her Oakley and she is very pleased, only some paint work but def a job well done
Not sure if they do part x, but if you google them there is some interesting info about clocking mileage on some of the chassis, so probably best to bear that in mind
If you're in the North West I would maybe try Andrew Maudsley horseboxes, his brother Graham Maudsley or Whittingham's if you're looking for a better quality one, I can recommend Andrew, he does the body & living work on ours even though it's not one of his and we've always been pleased with his work
Hope that helps