This sounds wonderful - I can't believe that it is so obscure, with a cast like that!

I'd never heard of it before it turned up on TCM! I know it wasn't Disney, but I can't imagine that accounts for it entirely. I suspect it hurt the movie that while the animation is terrific, the music is only all right: Garland does a beautiful job with the torchier numbers, but the song that's actually stuck in my head right now is "The Money Cat," the definite outlier of the bunch. I also have no idea what its availability has been like since its release. I've seen VHS covers online and there was at least one DVD, but I don't think it's in print anymore.