Nerd: Yes. No references to any sets of Judas with tunes there, and hardly surprising, given that it was a 13th. century piece. As you say, Niles was (to put it kindly) imaginatively inclined. Tori Mitsui considered the point in How Was "Judas" Sung? (Ballads and Boundaries: Narrative Singing in an Intercultural Context. Ed. James Porter. Los Angeles: Department of Ethnomusicology & Systematic Musicology, UCLA, 1995); I haven't seen the article, so I don't know how useful it might be.