Chances are that if you rebarrel you will probably need to re-bed. Your new barrel will probably not have the same contours as the factory barrel, and you might as well do the action at the same time unless you want to just hog out the barrel channel and do it by itself. Another option would be to have your gunsmith see if it is possible for him to duplicate the factory contour on the new barrel. You may want to check with the barrel supplier and see if this is an option they can offer you. You are most certainly going to need the services of a good gunsmith anyhow, as you will need to have the headspace set correctly, unless you are in a position to do this type of work yourself.
If you belong to or know of someone who is a member of a local shooting club or organization, they should be able to recommend a good 'smith in your area. Shooting supply stores would be another source.