Hill Boys,
Here's one on ebay for $18 and that's from a professional vendor. To street rod builders those are scrap iron that they can't even give away.
https://www.ebay.com/itm/51-52-53-54-55-56-57-58-59-CHEVY-GMC-TRUCK-RIGHT-FRONT-BRAKE-BACKING-PLATE/141912418273?hash=item210aa3a7e1:g:qzQAAOSwezVWzdCj&vxp=mtr
Unless you are in a huge hurry you'll find those for free.
If you have a stick or mig welder you can build up a pad at the worn area and grind it even with the rest of the backing plate in just a few minutes. I wouldn't use tig because tig is slow and will get that whole backing plate really hot. And why waste shielding gas on a mild steel project. I have tig, stick and oxy-acetylene and would use the stick for your project. If you're worried about burning through the thin spots 1/16" 6013 stick rods are available.
