Original pickup 'hanger' brackets were rare. Nowdays you can buy quality reproductions. That straight bracket bolts to the rear cross sill, back under the bed to protect the lamp from the dropped tail gate.
The standard tail lamp and license plate holder was standard design used from 1924.
The most rare '26-'27 lamp piece is the Ford accessory combo stop and tail lamp which has it's own special license plate bracket, no repro's of that lamp or license plate bracket made!