There are four handsome trade paperback editions from Lulu.com, each with a cover by a different artist, all priced at $14.50, and there is also the hardcover limited edition of the book for $275.
These are hand-bound at the Wyvern Bindery in Clerkenwell, London, and printed by Oldacres of Hatton Garden. Each book has original paper ephemera (see Flickr set) donated by various writer friends to the project, and comes with a SD card bearing the full text of the book as well as the full audiobook.
Worldwide airmail shipping from the UK is included. For two-day FedEx shipping, please add $75.
Availability: I have 20 books in stock at present.