You might take a 1/4 inch piece of all thread (2-3 inch) and split the end for 3/4 inch or so and slip it over the tang, drill, and pin through it. Chase the handle hole with a drill to accept the all thread and epoxy it, keeping the joint tight.
This not ideal by any means but it is better than what is there. This illustrates how good design and mechanical bonds are so important.