Dixie Gun Works and TVM (Tennessee Valley Manufacturing) are actually 2 different companies. My first rifle was a Dixie Gun Works "TN squirrel rifle". If that's the one you're describing, I seem to remember it had a lot of wood that could be removed. I would think a muzzle cap, entry pipe, and patchbox could be added (mine had a grease hole). Mine was in cherry with a dark stain applied. That would be removed when the wood is finished down flush with the new parts. It could then be refinished. Carving wouldn't really be appropriate for this type of rifle. I'm not sure you'll find someone who wants to do this kind of work. You might have more money in the work than the rifle is worth.