The British Library, Oxford University, and the National Library of Australia have the sheet music. It is not viewable online, but here is the description:

YOU CAN'T GET MANY PIMPLES ON A POUND OF PICKLED PORK
Words and music by Fred E. Terry
Sydney: J. Albert & Son, c1914
"Sung ... in J.C. Williamson Ltd's pantomime Humpty Dumpty".

Also:
London: Francis, Day & Hunter, [1914]