Sorry to hear that - that's an expensive light to have break! Definitely should be worth fixing at that price point. I'll leave the ideas for a fix to the experts. Wonder if ThruNite offers any kind of repair service? How far did you drop it? On to what surface? If it's still under warranty and you dropped it two feet on to a carpeted surface, I would think that should be covered. If you dropped it six feet onto concrete or a hardwood floor, not so much...
Good luck!