Two books published by The National Geographic Society about the Gospel of Judas are $2.99 each at Barnes & Noble. Each is currently $9.99 at Amazon.
The Gospel of Judas by Rodolphe Kasser, Marvin Meyer, Gregor Wurst and Francois Gaudard. This one includes text and commentary of the Gospel of Judas.
The Lost Gospel: the Quest for the Gospel of Judas Iscariot by Herbert Krosney. This is the story of tracking down and restoring the Gospel of Judas, but I don't think it includes the actual text.
I bought both, but haven't read either one yet, so I can't offer an opinion about whether either they're worth the time or money.