This Instructable will provide two solutions to a broken ladder lock buckle. One is for those who can weld and one for those who cannot. The welded version will show how to make your own ladder lock buckles. The non-welded version will show you how to use "D" rings, either those you purchase or those you fashion yourself.
If you make the "D" ring version, you will need "D" rings you purchase and a hacksaw or a Dremel tool with a cutting wheel.
If you make the ladder lock buckle version, you will need a hacksaw, a grinder, a vise, a hammer, and a wire feed welder.