I used G&H to redo some English bolt rifles about 2 yrs ago and the work was first rate. They are currently rebuilding a Type B in 9.3 and I will post before and after pics on the forum when the work is finished.

I have not had them build a custom rifle from scratch so I don't know whether they can match the beautiful lines of the early rifles. My guess is that they can. The people to ask would be Bill Supple and Paul Chapman of GH.
Personally I wouldn't hesitate to order a new GH custom and I would be reluctant to use anyone else for gunsmithing work.