Doh! Call me forgetful or what! The links I posted above in July 2011 still work, and you can still get Chris Thile's version on YouTube: so that's all three tunes.
And the link posted by Tootler in Jan 2011 still works for the score of the Hume version (as sung by McKellar in the link I gave) : you can get it page by page by clicking on the various numbers.