Someone gave me a cassette some years ago with several songs by Ron Kavana on it. I don't have it any more, although it's probably on CD by now. Anyway I think on the tape, Ron combined the old tune with his song of the same name to great effect.
The song tune is similar enough to do exactly what Tattie Bogle says and I have done it for many years now- Ron's excellent words are freely available on his website.