Bondo.
Seriously, I dunno about that one...
Ive broke my fair share, but never quite like that.
You could pike it with a battle axe or perhaps an underlay of sorts; siyahs maybe?
I actually dont mind breaking bows, just so I can fix em.
My advice is to try something, even if some folk say it aint gonna work.
You're bound to learn something, even if it's how to waste time and how to break more wood.
Bummer.