The EOWave sensor system has been a very good idea for creative works and installations of any kind but unfortunately nowadays people do the same with something called arduino more often.
We still have a bunch of good eowave sensors in stock, mostly equipped with a 6,3mm jack already and would like to sell them all.  If you order more than ten at once (from stock) you could ask for a special price, if you buy the whole remaining stock, lets talk.