Although Anger had originally asked Page to write the soundtrack he made it quite clear at the time of release he didn't want to use it because he claimed Page "took three years to deliver the music, and the final product was only 23 minutes of droning".
Naturally the whole thing blew up with Page insisting he'd fulfilled his obligation, and you assume Page feeling pretty damned insulted at the same time.
So now some 40 years later he decides to complete a full length release including the original 23 minutes.
It's currently only available through his web site.
But not exactly available, unless you login to the site in the usual way (another tiresome user/password set up) you don't get to see a thing. In fact not only don't you get to buy the vinyl only release but you don't get to see anything else of the site either. Just the splash screen and a utility page where you can learn that Jimmy 'produced' the site.
Ah ha.. so it's a concept from the "Zoso" one.
Not sure what Jimmy is developing here.. maybe some exclusive cult of Pageness or a mystical carrot of desire now you know it's impossible to obtain the precious vinyl unless you sign up to the club, but no doubt Jimmy will be as unamused as he was with Kenneth Anger when he discovers that doing a search for the album reveals that second only to his own site is the BitTorrent download of the album.
Anyway to make your own decision as to whether it's all worthwhile here's 10 minutes of the original soundtrack. Be aware though, it is not the missing Zeppelin album.