Three issues here, the brackets, the bumper itself, and tailgate clearance. The bracket issue is straightforward though not easy, not available original or repro so has to be fabricated. All the bracket has to do is fit the frame and the mounting holes on the bumper.
As to the bumper, I would try to match the front bumper as to style. Repro bumpers are available without the smile 1933-36. Or use 1932 as noted above, or 1937, or 1940 or psudo desoto... your truck your choice.
The tailgate without the chains hooked dropped straight down. The bumper will need to be mounted forward enough to clear (and become ornamental only) or care taken to avoid dropping the tailgate and damaging the tailgate and bumper.