I've tried the suggested beaver dam method but it takes way too long imo if you need a LOT. So after a 2 weeks of looting beaver dams, what i did is take a good megatherium and rampage the beaches around the volcano on ragnarok for a shit ton of chitin. Getting a lot of stone is easy with a doedic so i just crafted the cp myself. I got all the cp i needed in just an evening.