Abstract: An adapter for attaching to the edge of a door, such as a freezer door, to permit coupon dispensers, display devices and the like to be mounted to the edge of the door. The adapter is held in place with a clamp that bears against the door handle. The adapter includes a mounting plate perpendicular to the door so that a coupon dispenser or other display device can be mounted substantially parallel to the door. The mounting plate includes a portion of a price rail so that the same coupon dispensers and mounting brackets used with grocery shelves may also be used with the present invention. The price rail may be a separate piece that is welded to the mounting plate or formed from the same piece of material as the mounting plate.