Orpheus and the Bacchic Gold Tablets
I see that oxbow has Graf, Fritz and Sarah Illes Johnston (2007) Ritual Texts for the Afterlife: Orpheus and the Bacchic Gold Tablets Routledge, ISBN 0-415-41551-9 on sale for £17.00 in paperback.
Edited to add: there is now a review at BMCR.