If you can find it, I strongly recommend picking up the LP "The Manson Family Sings Songs Of Charles Manson," released several years ago on LP. Probably floating in the interweb somewhere. It's fantastic; really great apocalyptic folk on par with any cool psych folk of its time. I vastly prefer this stuff to actual Manson recordings; the music is considered, creepy and beautiful and has male and female voices and great lyrical content. Seriously, independently of the "Manson Factor," that LP completely holds up and deserves appreciation.
Looks like it is digitally released too, and maybe expanded:
http://www.moviegrooves.com/shop/familyjamsmanson.htm