My grandfather used to sing this song to me and my siblings and cousins around 1957.
One cousin was inquiring about the song as she has a paper with most of the lyrics written by our late grandfather.
I found (ukulele) sheet music online by Mai Singhi Breen, see link:
http://www.ianchadwick.com/pdfs/may_singhi_solos.pdf

You can also purchase CD by The Original Beverly Hill Billies at:
http://www.rootsandrhythm.com/roots/Newsletter147/newsletter147_BACM_6.htm