Here is a picture with the panel on the driver door. There is a slight curve coming down the front edge of the door and putting it on the other side will go on, but not fit right. If anyone has a spare R I would like to trade an L.
Jerry
You can actually see the “L” in your picture. I will check again but I saw no stamping on mine last night.
I only have the 1953 left side hinge panel and the others are 1954.
You may want to try posting in the “Truck Parts Wanted” forum.
Good luck with your project.