This might be closer to what you want ultimately. From WotC's web site
http://www.wizards.com/default.asp?x=books/fr/lonedrowstats
Quiver of Anariel:Quivers of Anariel appear to be typical arrow containers capable of holding a score of arrows. However, the quivers automatically replenish themselves with standard or magical arrows, such that they are always full. Some quivers also create arrows made of special materials, such as adamantine, cold iron, or alchemical silver.
Once an arrow it taken from the quiver, it must be used within 1 round or it vanishes.
Moderate conjuration; CL 7th; Craft Wondrous Item, magic weapon, minor creation; Price 28,000 gp (standard arrows), 29,000 gp (masterwork arrows), 32,000 gp (+1 arrows), 44,000 gp (+2 arrows), 64,000 gp (+3 arrows), 92,000 gp (+4 arrows), 128,000 gp (+5 arrows); Add an additional +6,000 gp for adamantine arrows, +4,005 gp for cold iron arrows, or +200 gp for alchemical silver arrows; Weight 1 lb.
As far as storing bundles of arrows in the other slots, I really don't see why you couldn't. It seems needlessly pedantic to insist that they have to be whatever the slot is for especially given that the SRD says "The first and smallest one can contain up to sixty objects of the same general size and shape as an arrow. The second slightly longer compartment holds up to eighteen objects of the same general size and shape as a javelin. The third and longest portion of the case contains as many as six objects of the same general size and shape as a bow (spears, staffs, or the like)." So it does say "Objects of the same general size and shape as a".
I might require you to bundle the arrows together though. I could never understand why a quiver for archers would have slots for Javelins anyway.