According to this no-longer-canon answer you don't have to be a Force user to build a Lightsaber, and this answer states that there is no outside company that builds them, so who's in charge of creating all the training sabers, pikes, and other weaponry?
There's no mention of the Jedi Temple Guards making their own weapons either on their Wookieepedia or databank pages, but they must come from somewhere. Same with training sabers.
My thought is that there's a group of retired or artisan Jedi who spend their time producing or replacing things for the armory. Kinda like how older earthlings take up wood carving.
Is anything related to this ever mentioned?