Unobtainable ingredient

Talking about Gilded bark, Im not 100% whether its actually no longer obtainable but i spent hours killing mobs that are supposed to drop it, some mobs mentioned in the wiki that are supposed to drop it are no longer to be found and after hours of grinding mandragoras with 150% loot i wasn’t able to get it (said item’s level is higher than the mandragoras idk if there’s any correlation tho). Gilded bark is needed to buy the only Neutral Damage bonus necklace so i’d say it might be a little important.