i would get some black fondant from the cake deco store and knead in one of two substances
- tylose also available at same store a teaspoon or two per pound maybe
- cornstarch like 1/3 cup per pound give or take
then knead it in real real good
roll it out maybe 1/4 to 3/8 inch thick and cut your silhouette out with an exacto or whatever
let them dry flat for several days--you should be fine
you could make two thinner ones for each one and splice them together with royal icing or melted chocolate and insert a popsicle stick in there to help it stand up--again let it dry real good--you could either let the edges go as is or pipe around them or apply a ribbon depending on the intricacy of the design--ooohh you could sprinkle the edges with edible glitter too (paint with loosened egg white first and dip in glitter)
how large are your templates?
you good with the disco ball?