This is really just somewhere to store this information in case any other /. users want it ..... I just discovered to my great joy that the National Public Radio adaptation of Walter Miller's classic sci-fi novel A Canticle For Leibowitz is available for download as an MP3 or OGG audiobook from archive.org :
http://www.archive.org/details/ACanticleForLiebowitz

So you can ignore all those dodgy Russian download sites now :)