Your family heirloom rifle has exceptional engraving, even for a New York rifle, and a fine piece of walnut. If it were my rifle, I think a limited restoration, as you described with just two ramrod pipes and matching ramrod, would greatly benefit the rifle. However, with a rifle of that quality, I would have the work done by a knowledgeable [in Eastern/New York rifles] restorer to ensure everything matched properly in size, fit, finish, details, etc., including the ramrod with appropriate style metal tip and worm.
Shelby Gallien