Your fore-end has already been repaired once by an Armourer as shown by the patch. It is called a a drawer patch for reasons that I won't go into - again!

There is a repair for this and it DOES NOT entail just gluing the old bit back! To do it ptoperly, a previous thread details how to do it correctly and in a way that it'll last for another 90 years. I am sure someone will resurrect the thread. Fairly easy to do if you are a half decent user of basic hand tools. Zillions of forumers here have done this repair successfully

But I wouldn't mind betting that the bit broke off because you pulled the body and barrel out of the fore-end wrongly. Good luck