Captain - I understand that you could not reproduced the original exactly, but perhaps a "revised" version is something worth considering.    To my way of thinking, a song is something that is living and can always be tinkered with - not necessarily improved but looked at from a different perspective.    By creating a new work, it also makes the product that Bulmer is holding less valuable to him - in the eyes of most people - "new" is perceived as "better", and while that is not necessarily true, it makes his hold on the product less valuable.