Don't we all!
I would offer two things, maybe a general use "shop knife" such as the Element Wharnie that I will be picking up at the Gathering in a few days (yes!!!). I would think that is something that would come in handy on a daily basis in the wood shop.
If it's a custom carver that he really wants have him sketch up a design of his own. With the kind of skill and experience he has, I would have to guess that he has some pretty specific likes and dislikes. This would give him the chance to get something that would be truly useful, not a suggestion from the comparatively inexperienced lot here.