Hi, Kat - this site (click) tries to list all the musical settings available for Kipling's poetry. Apparently, the definitive tune for this was published by Percy Grainger in 1898. This page (click) also has pertinent information. There should be an MP3 here: http://www.spod-central.org/~psmith/mp3list.txt - but I don't know how to access it.
That's a start - now, where to find it. I dunno.
-Joe Offer-