Our very own JPC owns Miglior which isn't too far away in Accrington ( i drove to him from Wigan) and does an outstanding job. PM him for price as it all depends on the level of work you want.
There is also Finer Details that used to operate around that area (not sure if they still do)
Best bet though is Jay (Miglior) and if you can't use him for some reason then hop over to Detailing World and have a look on there as someone should be able to point you in the right direction