The "proper" approach would seem to be making the photographs with the proper studio setup to avoid distortions right away. (edited)
Alternatively I would recommend
• converting the image to a Smart Object
• using the Rectangle Tool to create a rectangle of the proportions of the actual object
• creating a Solid Color Layer with that Vector Mask and reducing its Opacity
• selecting the SO again and invoking Free Transform (cmd-T) and dragging the corner points with the cmd-key pressed until you reach alignment of the object and the rectangle