If anyone is interested in rice hulls, please contact me through this http://www.pyro-stuff.com/contacts/ contact page, and maybe I can make a better deal for people who life in the UK.
I have the rice hulls back in stock later today.
Breaks are perfect, just a not too thick walled casing made of a grayboard kind a like carton. These are used for commercial purposes as well. It's not the material, it's the way how you use it.