I have a friend who downloads all kinds of disney tracks, incluing the HMH. He gets everything from ride tracks to old walt drops and outtakes from the guy who did the voices on the Matterhorn and monorail and stuff. I have like over 50 hours off neat stuff to listen too. I can find out where he goes if you are interested.
go to Visionsfantastic.com
They have a section called 50 Years of ImaginEARing.
This guy (forgot his name) has compiled LOTS and LOTS of songs... HMH being one of them. And it's the complete track with EVERYTHING...
However, it has gone offline already because the site is featuring 10-20 songs per week. But you can still listen to it on their online radio station.