Have seen pics of a broken one & as a toolmaker(retired) I think I have a fix. But have never done one, so I just deleted my proposed procedure as it was just guessing.
Another toolmaker that saw the same one had similar thoughts on a fix as I, so it might be doable.
Showing one to a toolmaker that you're asking for a fix will likely get you an answer. But don't let one "no" answer stop you.
Good luck.