Found it on iTunes for 99 cents.
Then I found this link, through the publisher, for a free iTunes download of the song.
Thought to myself, “Self…that is really odd. Why would the publisher provide a free download through the iTunes interface, when iTunes charges for it? Why not simply have the iTunes link be a free download? Or instead provide an MP3 download on your site rather than pushing people through iTunes…”
Just another oddity in the world of DRM/copyright.