Amazon has an assembled kit for sale: http://amzn.to/2AxtPBS
Also, more info from soundlazer.com, here: http://www.soundlazer.com/what-is-a-parametric-speaker/
Also, reminds me of the MacGyver (original) episode "Soft Touch"- where a Columbian drug cartel tortures a federal agent in a garage using high-decibel noise.