Repair Service For Gallo Sub Amp?

My Gallo S.A., normally used for the bottom end of a pair or Gallo Ref. 3.1 towers, has failed. Would lke a recommendation fot someone who can fix this thing! Thanx much.
Contact Gallo direct; they went way out of their way to help me repair a client's sub about a year ago. Sent me the entire amp board mounted on the rear panel, all I had to do was attach the wires and good to go.