Make your own tinfoil portraits/sculptures. You could buy face masks and give students tinfoil. I think this would work. Would probably look even better on a black canvas or cheaper option, black card.
They used recycled music sheets and paper mache all around the mask to mould it to the shape of the head. This one is in all white and has a music theme which is an inspiration to one of the projects that I did which was Moulin Rouge.