Thanks for the tip. I checked through those, but none is the same version, nor do any of them contain the verse in question.

By the way, my favorite parody was the one the Smothers Brothers used to do:

"I see by your outfit that you are a cowboy. You see by my outfit that I'm a cowboy, too. You see by our outfits that we are both cowboys. If you had an outfit, you'd be a cowboy, too."