Appreciated Mousethief. If you follow Morticia's link higher up the thread you come up at those lyrics together with a midi rendition of the backing. All his other (published) song lyrics are there too, and in some cases the midi versions are really good.

I've no idea whether the site has reached a copyright agreement with Lehrer, whether he just turns a blind eye, or what, but it's a damn good facility to have available for free.