The only other info I've been able to find was that Bob Clampett had a copy of the original ending for years (Clampett was known as a pack rat at the WB studio and saved a lot of production materials that otherwise would have been thrown out) however Clampett's copy was stolen at some point, according to his wife, Sody.
Making this post because I was curious if anyone here happen to be film collectors? If so, Any one ever done any kind of search to see if by some freak chance they have this cartoon with its original ending?