That was one thing I'd always wondered about in AotC. All past lore had said how it was a rite of passage for a Jedi to make their own saber, even with the idea they weren't really Jedi until they did. You had YOUR saber, & due to the crystal, a special relationship with it.
Then, in the arena, dudes just roll up & toss a couple to Obi Wan & Anakin, so immediately asks... Where did 2 extras come from, why were there a couple extra, how did anyone know that anyone would be needing a saber.
I guess they could be sabers from some Jedi that had fallen in the battle, but it had just started & there aren't any Jedi down near where the scene takes place, or maybe those 2 Jedi just happened to carry 2 sabers like Ahsoka & were willing to give up their extra.
IDK why that always bothered me. Lol