I don't think you will find any actual rules for this. You will have to work something out with your GM. What you have so far sounds alright. However, as of now your arrows would actually still deal damage to your targets...
Also, any time you increase CL on an item, it always increases cost.
So, as to costs:
If the quiver exists and your GM ok's it, then you're fine, of course, which gives you a very affordable base cost for the item.
Magic Weapon lvl 1 x CL 1 basically at will is 2000 GP.
Spell storing I would just go with the property, however strictly speaking you would now need to pay for a +2 bonus, which means another 6000gp
Cure serious at will and use activated is Lvl 3 x CL 5 x 2000 which is 30000GP.
Everything together is hence 38900GP for a CL 5 item.
Depending on your GM you may get a discount on this, or he may even decide to make it even more expensive. Personally I don't think this is overpriced, because at will spell effects SHOULD be very expensive. You might get him to reduce the price a bit if you add some restrictions, like can only be used by a Cleric, for the usual 30% discount. However, there is still the question of how often per round the quiver works: Does it produce one arrow per round, or immediately replace one when drawn? In the latter case, I would easily multiply the cost by 5 or even more.
Does this help?