I couldn't find the words of this one in the DT - but click here" for an interesting discussion about it.
Also, if you do a DT/Forum search using 'Eric Bogle' you will find the words to many of his songs. (I apologise if that's ovious and you've tried it already.)
Failing that, have you tried a "Google" search?
Link fixed. --JoeClone, 15-Nov-02.