If i had the part to take a picture of i would not be looking for one. I heard the story about 61-64 being the same. I can can't confirm that. Your 62 has a one piece door right? Not the tailgate? But it is the piece on the top, inside between the trim pad and glass. This one has replaced the trim pad with a stainless steel panel the first set of Eureka rollers starts in it. Then they moved the filler panel that fills the gap between the rear floor and the back seat up. It now fills the gap between the gate and there floor. There floor went from the rear opening to the back seat. Flat no gaps. But with out that upper panel were the cat whiskers go, it looks pretty rough.
OK... Now I have an idea of what you are looking for. This part doesn't have an individual part number, because it is part of the inside door panel. It is the only part that you need to save for when you have replacement inside upholstered door panels made. It should be the same from 1961 - 1964, across all station wagon model, however, I can't say for certain, since many of the station wagon parts that you would assume would be the same were changed every year, and sometimes mid year for a reason that isn't understood, however, must have had a good reason inside of GM corporate office. It might have been for ease of assembly, or a vendor change. Even looking it up in the parts book isn't going to help, since each year the part changed, with the change of the interior door panels.
As an example, the gas tank is the same for the 1961 - 1964 station wagons, but the shield that goes in front of the gas tank, and behind the rear wheel, changed every year, until 1964, when the parts book indicates that it fits retroactively back to 1961 (with modifications), but they don't indicate what those modification are. Most likely, it is attachment bolt locations, but not having one of each year, I have no idea.
Moving onto the side panel moldings, they are not the same from year to year, and each year is specific, and each model. The Biscayne moldings are not the same as the BelAir, nor the BelAir is not the same as the Impala.