Just mention in case it is not known to some: the Blackmask collection (without the few troublesome pulp fiction Doc' etc, titles) has been been available at
http://www.munseys.com/ (which is Blackmask reincarnated) since soon after Blackmask was closed.
No collections on media for purchase off the site though, as far as I know, and although many of the books are available elsewhere, on Munseys they are available in all the common formats (including .lrf).