These coin slots are the perfect finishing touch to a post office box door bank.  I've seen these selling for as much as $6.75 each plus shipping at some woodworking supply houses.  These are made in the USA using 12 gauge brass with an antique finish and include two #16 x 1/2" escutcheon pins per coin slot as pictured.  The measurements are approximately 2 7/8" wide x 1 7/8" tall and the slot opening is 1/8" x 1 1/4".  This price is for one lot of 5 each.

Ask about rates on greater quantities.

They are individually wrapped in poly bags for protection.