Wala pang string tree. Masyadong pinilit IMO.
If you really want to DIY this, Here's how I would approach this: You can try drasttically modifying the heastock by plugging, cutting and grafting another piece of maple. Make sure you use dowels or better yet, biscuits to ensure stability of the bond. Glue a headplate veneer on to add strength to the headstock. Shape, drill, install and rock!!!