I've been singing a version of the Lord Lovell parody for over 20 years. Can't recall where I first heard it done, but I later got the words from a book in Bradford's main library. The book was actually looking at songs from a fairly serious perspective, and had the two versions, Lovell and Muggins on facing pages with the versions matched verse for verse and line for line.
It is close, but not the same as the two versions linked to by Malcolm. If I have time in the next couple of days, I might manage to post them.
Quack!
GtD.