go to hks proffesionals.
Melted plastic
I think you could try to use clay and make little things for your dolls. I've made some cinnamon or rolls out of clay for my little mini figures Sculpey modeling clay is an excellent product for making small items.
Make them a loose dress and stuff it with cotton balls or make the a fake clay stomach.
Steel investment foundries make use of clay refractories
Adobe clay
brown clay is stuff to use to make dishes and (etc)
Corn
Most people that honestly use voodoo dolls will make them their self to suit their intended purpose.
they used clay
you take a piece of clay and use it on a bucket of water, voila, soft clay.
simple you dont