WE JUST BOUGHT AN OLD HOUSE BUILT IN 1906. THERE ARE SEVERAL SECTIONS OF LOOSE, CRACKED PLASTER ON THE WALLS. WE ARE LOOKING FOR A SPECIAL WASHER CALLED A PLASTER WASHER WE SAW IN A THIS OLD HOUSE REPAIR MANUAL. IF YOU CAN SEND A NAME OF A SUPPLIER THAT MAY SELL THEM IT WOULD BE GREATLY APPRECIATED. THE WASHER IS MADE OF SOME TYPE OF METAL AND IS ABOUT THE SIZE OF A HALF DOLLAR WITH SEVERAL SMALL HOLES ALL OVER IT AND THE CENTER HOLE IS JUST LARGE ENOUGH FOR A DRY WALL SCREW.