Just a simple piece of soft (1100) aluminum sheet.
.063thk. folded at a 90° angle. Fits the jaw size with a 1/2" ledge on top to hold the alum. onto the jaw. One for each side.
Cheap, easy, simple to dress (remove burrs), and easy to replace as required.
If I need anything fancy, I can build something more like the post above. But most things work well with simple protection.
Mike