Redead bandages have become a real roadblock for me unlocking badges for a few characters. I'd just ask about those, but I know that once I find all of the redead bandages I need, it'll just be another item. I'm not sure how many items there are, but hopefully the list isn't too long. There seem to be three tiers of items (bronze, silver, and gold?); I'm drowning in bronze ones, but I'm particularly interested in the silver and gold ones.
What are good places to farm for each of the non-super-common crafting items?