Sadly, the sledge' in question is a fibreglass moulded-in handle, so the re-attachment isn't quite so easy.I have kept the same 14 pounder for several decades and its still working. But the shaft has got shorter as the years roll by, each time the head falls off when the shaft wears through it has to be shortened and re-fitted.
I may drill the handle out and see if an ash handle can be attached, but looking at the hole in the head, it may not be possible.