I contacted him a month or so ago, via the email address you mentioned. AFAIK
he can still be reached via that address.
BTW: I have a Zadow magnetic pickup, and it is a real joy to play with. Sure, the sound is not my bass but only louder, but in very loud settings (pop, funk, rockabilly), it is perfect! It looks good, too (I ordered the brass one) and is custom made. You just need to give him the measurements he requires and a pick of the underside of your fingerboard. Good luck!