There's still no DVD of MESSAGE FROM SPACE or GREEN SLIME. Not even rumors of plans for them.
I'm still watching my VHS of Showtime's 2004 broadcast of MESSAGE and my VHS copy of a 1980's Betamax recording of GREEN SLIME from TNT's Monstervision.
I'm getting a little discouraged here. I can't even find bootlegs on the web that aren't sourced from VHS.