Here are some head containers I made a few years ago. I can't remember the company name that made the molds anymore, but somebody told me they no longer offer them.
You make the face part our of cement (I used Qwikwall) and embed a terracotta pot in the back. I have some painted ones and some unpainted ones. Not all have beads glued on them either. Obviously the terracotta pot does have a drainage hole.
I would be willing to sell some if anybody is interested. I'd have to figure out a cost, and since they're cement, they're heavy to ship. Let me know if anyone wants to see pictures of some I have available.