I have some foggy memories (what else at my age?) of Entertainment Films offering regular 8mm magnetic sound complete feature prints of She-Demons, Frankenstein's Daughter, and Missile To The Moon back in the mid-late 1960's, though no longer have any old EF brochures to back them up.
All these beloved drive-in clunkers were released theatrically by Astor Pictures, and Entertainment had made a deal with Astor for the 8mm rights to L & H's The Flying Deuces (then still under copyright) so it would have made sense for them to have picked these up too. I do know Frankenstein's Daughter was released in a 200' 8mm silent cutdown re-titled "She-Monster Of The Night."
She-Demons, as you may know, starred Irish McCalla (TV's Sheena of the Jungle.) I've been trying to verify this 8mm info to pass along to a wonderfully obsessive Australian who is possibly the world's greatest Irish/Sheena fan. He's a fair dinkum bloke (Aussie for a mensch) and I'd like to be able to pass along this info to him. Thanks!