Philippa,I haven't seen Mick in a few years now and I have no information on how to contact him. I learned the song directly from Mick and I don't know whether he ever had it formally published or copyrighted, so I wouldn't like to post it to a public forum without his permission. I've been singing the song on and off for a long time now, but Mick knew about this and had no problem with it.
Next time I meet Mick I'll ask him if its OK to post the words.