I have an 80's Godin bass with a Zeta piezo pickup. It has had intermittent electronics since it was about 1 year old. A small tap on the circuit board used to make it work. Godin discontinued the instrument in the late 80's and have no support for it. It looks like this one: http://www.talkbass.com/forum/f8/new-bass-arrived-1980-godin-zeta-z1-piezo-inside-339054/ Is there an aftermarket pre-amp that would work with this piezo pup?