Well, Diane - there are three listings for the song at the UTK Song Index, so that means you could get it from the University of Tennessee at Knoxville Library (or maybe get one of the books through inter-library loan). The lyrics are in our database click here with reference to a wonderful-sounding Michigan songbook I don't have and hereby covet.
Watch this thread for a few days and see if somebody posts an answer. If you get a midi, please think about sending it here to the Digital Tradition database.
If you get no results, try starting a new thread with the title, Floyd Collins - MIDI request Good luck - I'd sure like to hear the tune for this song. Sounds like it would be a good one.
-Joe Offer-