www.futuristicimagination.com/item/

Although it still has some Japanese text, it’s really quite usable for anyone that can read English. Which means you, right? It’s quite self explanatory, just type in the item you’re looking for and hey presto! A list of how to get it via cutting off tails or breaking faces, and also which quests carry the reward.

Via Electric Leo on the Capcom-Europe Blog

Comic from Bleedingcrow