We have a vintage single metal bracket.  It is a mix of rust (surface) and a small amount of the original black paint  It measures about 9" x 7 1/4" x about 1 1/8" in depth in the inside corner where there are 2 places for screws to be placed.  This has a "wirey" look to it where the bracket is open in the center between the metal pieces and the brace sinches it together on the top and bottom.  It has an antique/vintage patina and style.
I will ship internationally, please contact me with your country for a shipping quote.