Tube Audio Design TAD-125 Hibachi Dragons

Hows It Everyone? I'm in need of information on where about getting a "circuit board" for one of these mono blocks. Its been in the service shop to replace new caps & resistors & found out the circuit board needs to be replaced. How all this came about is beyond me because it was working great then boom it was out for  the count. Since Paul G. had passed away awhile ago I'm in the need of help to find parts or a additional Mono Block. Anybody out there  may know where to look & locate this Model? Greatly Appreciated! Dean.