I recently bought an old Allen & Heath System 8 1616, sixteen track mixer for decently cheap because it didn't have a power supply. After asking around online I figured it would be about $100 to $200 to either buy a replacement or have one built, the schematics are available. So anyway, I finally got in touch with the only electronics repair shop that I've been able to find in Atlanta, and they told me it could cost about $1100!! Is this reasonable? The board was only $400. Does anyone know of a place online that will build/replace one? Or does anyone have any other suggestions?