I broke down everything listed to wowhead links and where to find it:
Swiftthistle (2)
Swiftthistle
Typically gathered from Briarthorn & Mageroyal
Witchberries (2)
Witchberries
Buy from Nam Ironpaw near your farm in Pandaria - [npc=64395] (1 Ironpaw Token)
Small Flame Sac
Small Flame Sac#dropped-by;0+3-9-10+1
Dropped by most whelps - Dustwallow Marsh & Badlands are a good spot. Although if you don't want to fight everybody else for kills/drops, just go to Dire Maul & kill an Eldreth Darter - it's in the wing with Tendris Warpwood, up on the top area above him.
Aromatic Fish Oil (2)
[spell=273293]
Created by breaking down most BFA fish.
Bloodfin Catfish (5)
Bloodfin Catfish
Fished up in Deadwind Pass & Zul'Aman
Deviate Fish (4)
[item=6522]
Fished up in Northern Barrens, Wailing Caverns & Southern Barrens
Nettlefish (2)
Nettlefish
Fished up in Wintergrasp, Sholazar Basin, Dragonblight & Ulduar (Wrath of the Lich King)
Furious Crawdad (3)
Furious Crawdad
Fished up in Terrokar Forest (Burning Crusade)
Deep Sea Monsterbelly
Deep Sea Monsterbelly
Fished up in Shimmering Expanse, Throne of Tides, Vash'jir, Borean Tundra, Dragonblight & Howling Fjord