Dexter 12-1/4" x 4" Right Hand Shoe Set 10kHD Cast Plate Trailer Axle Brakes (K71-500-00)

RH Brake Shoe Kit for Dexter 12-1/4"  x 4" Electric Brakes with Cast Backing Plate
PN: K71-500-00

You can use this backing plate kit to repair your worn down backing plate instead of having to replace the entire assembly, you can just pay for the part that you need and save some money!