It seems to be sold exclusively at his website, Beesweb. Here (http://www.richardthompson-music.com/catch_of_the_day.asp?id=117) is the list of tracks, which includes "Sumer is Icumen In," "Oops! I Did It Again" (yes, the same), and the remarkable "Marry, Ageyn Hic Hev Donne Yt." Click through to the merchandise section and you can buy it, along with various "authorized bootlegs."