Need new/replacement PCB for My Book Essential 3TB

Does anyone know where I can get a replacement printed circuit board for my external hdd? My friend plugged in a wrong power coard and it smoked a diode or two on the PCB.  Images attached. PCB_MyBook_3TB_1.JPG PCB_MyBook_3TB_1.JPG

If you search the posts by fzabkar he has helped people bypass the burned diode. Or this might help