I've said it before and I'll say it again Les Barker is a genius.

Theres another parody written by Johnny Moynihan (em member of Sweeney's Men, Planxty, De Dannan and the Fleadh Cowboy's to name but a few) called John O' Gods - which is about a former folk singer who ends up hitting the drink hard and having to go to John Of Gods which is a place in Dublin which treats alcoholics and other assorted addicts. I don't have the words but hopefully someone else out there will have them.