Board Thread:Skyrim/@comment-108.220.170.100-20150611005536/@comment-6881629-20150721145915

It's not a great answer but Dwarven Centurion's carry arrows and the arrow type is leveled, they also have a few gems that can be sold to let you buy more arrows. They are pretty tough though and there aren't many of them.

One of my main hobbies in Skyrim is going from city to city bounty hunting you get a lot of arrows from the bandits and gold from loot (maybe to buy the better quality arrows from merchants), but that can sent you after dragons and giants too.