Sorry, I was referring to actual ones, outside of PFS. If you google it, they come up. But, that's getting away from the point. So, let's say if my monk went looking for a scabbard of vigor designed for a short wide blade, bought it, then stuck his hand inside. There's no mention of it having to be a bladed weapon or that the scabbard be designed for the weapon; just that it holds the weapon.
Description
Once per day, as part of the action of drawing forth the weapon held by the scabbard, the wearer can order it to endow the weapon with an enhancement bonus on attack and damage rolls. The duration of the effect depends on the desired enhancement bonus for the weapon.
Bonus Duration
+4 1 round
+3 3 rounds
+2 5 rounds
+1 10 rounds