Feastrex Field Coil speaker repair

Beyond contacting the manufacturer in Japan or the distributor (none in U.S. as far as I can determine), can anyone suggest a repairman or women who could work on a Feastrex NF5ex field coil driver?  One of mine went out yesterday.  Checked amp, pre-amp, all wiring, power supply for field coil, etc.  It's the driver.  I heard a loud snap and smelled burnt electrical smell from that side of the room.  Auugghhhhhh!!!!!