Here's where you can hear The Lumberjack Song:
http://www.montypython.net/sketchsounds3.php
Scroll down to The Lumberjack Sketch. I like this version better, but am putting the following also, as there seem to be options for different sound players:
http://humor.about.com/library/sounds/blmp3.htm

And tsuwm, here's an alternative that should be of particular interest to you, my Dear :
http://www.cs.stir.ac.uk/~scu/Humour/Computing/notlumberjack.html