I'm currently wearing the ancient shrouded armor earned from one of the Dark Brotherhood quests. The head piece that i have equipped gives me an extra 35% for bow. But now since I want to create Daedric armor, how the hell can I add +bow damage on it. The only +bow equipment I found is the one I currently have on, I haven't found anything else that I can disenchant that gives the +bow stats.

My assassin wears light armor, except for the gloves which are heavy armor, because of a 25% more bow damage enchant. Also have a cowl (20% more damage), and a ring that has 25% more damage,

If you learn to enchant, you can disenchant these pieces and then put them on other armor you use. Just be aware that in the beginning of "learning to enchant," the percentages are lower, and take a while to level up.