At the time, I couldn't find a source for those who wanted to find out more about Dr. Christopher Cattle's stools. Which left me kind of irritated, because I really want to look into getting one (if only I could find some outdoor space where I could grow one).
Apparently kits are or will be available soon. And regarding "lead time", it takes about 5 years to grow one. The natural wood stool that is shown "harvested" above looks really cool. As does the formwork for shaping the stools, shown left.