I am absolutely stunned. Beautiful piece, such craftsmanship. The thing is that he is crying out for an as authentic handle
Would be a great challenge to try and match his work with your own handle.
I am sure there is a guide online for handling a stone axe somewhere with a native wood that would have been around in the Neolithic period such as ash or rowen.
If you do give him a handle, be sure to post some pics
Very jealous Craeg is!!!