Sounds like the player is, in essence, trying to get the Quick Draw feat for use with his scrolls in exchange for spending a small amount on an unusual piece of equipment. I guess I might allow the bandolier for the cost of a belt and a number of small pouches or scroll cases equal to the number of scroll slots he wants. I'd also allow him to draw whichever scroll he desires, since he'd be able to know by feel if it was in one or another of, perhaps, six slots but I wouldn't allow it to be read in the same round without provoking an Attack of Opportunity.
However, I might also allow for a magic item to be created that costs 5,000 gp (half the cost of gloves of storing) that allows one to draw any of six scrolls and read it as a full round action (and without provoking an Attack of Opportunity). Only one bandolier can be worn, cannot have more than six slots (but can have fewer) and it would take up the "neck" slot for magic items. I'd used shrink item as the spell since scrolls can come in many sizes, really, and the size needs to adjust to allow the bandolier to function precisely. Seems fair that it should cost less since it is more specific than the gloves of storing. Anyway, here's a rough idea of an item -
Scroll Bandolier: This device is an unassuming bandolier of leather with 1d4+2 slots across the chest into which scrolls can be stowed. As a full round action, one can retrieve any of the scrolls within and read it without provoking an Attack of Opportunity. This device takes up the neck slot for magic items.
Faint transmutation; CL 6th; Craft Wondrous Item, shrink item; Price 5,000 gp
It's a tough call. On the one hand it could be seen as a free feat. It might also be seen as getting any one of six spell-like abilities available to you. Maybe the cost should remain closer to 10,000 gp?