Where can i find a hollow mold to pour gel in to make a body for an experiment?

Question

need a mold that is hollow in the inside and can remove to see ballistic set mold inside

Answer 1

This sounds like a crazy reference but if it doesn't matter what the "body" looks like, here's a link to an alien mold. Make sure you scan down the page until you get to the hollow one:
http://www.yankeehalloween.com/qwiggle.html#prod6