There is an Arrowsmith mod on SkyrimNexxus. You can make your own arrows after collecting the wood and securing the requisite number of hawk feathers, which are obtained by shooting the hawks down. It doesn't require the smithing or archery trees to be maxed out either, because I stopped just short of dragon armor smithing (around 96 or so) and can in fact smith arrows all the way up to Daedric. The mod may actually add an arrowsmith perk but I'd have to be in front of it to see what went on. Just know there hasn't been an arrow purchase since.