Found a decent living mannequin clip on you tube, just type in secret recesses of the heart in the search bar. . .some pretty hot babes as actual living mannequins. Im not sure if this was originally from the night gallery or not, but it looks like it dates around the 70's.
Architect Preston Rodgers (Carl Lamb) has fallen in love with a different type of Hollywood plastic; a mannequin (Louise Myrback). After meeting the mannequin model (Sibel Ergener), Preston's obsession takes him on a soul searching journey to an eccentric encounter with madcap designer Dumont (William Rooney). This experience is where Preston uncovers his obsession in the deep unknown.
http://www.youtube.com/watch?v=Wec6UkWtuWI