Hi and welcome to the forum:
For something like that, if it has broken off at a hinge point, the camera will need to be opened up, for that, if you are in the US, I would call 800-OK-Canon and talk to a tech support person.
cheers, TREVOR
The mark of good photographer is less what they hold in their hand, it's more what they hold in their head;
"All the variety, all the charm, all the beauty of life is made up of light and shadow", Leo Tolstoy;
"Skill in photography is acquired by practice and not by purchase" Percy W. Harris
