You will find the alchemy vendors that sell limited supply recipes here in this wow guide. It is organized by the recipe and they are all in alphabetical order to make it easier to go through.
Elixir of Demonslaying
Nina Lightbrew - Blasted Lands 90 Silver Limited Supply (1)
Rartar - Swamp of Sorrows 90 Silver Limited Supply (1)
Elixir of Shadow Power
Maria Lumere - Stormwind City 90 Silver Limited Supply (1)
Elixir of Superior Defense
Kor'geld - Orgrimmar 1 Gold 30 Silver Limited Supply (1)
Kor'geld - Stranglethorn Vale 1 Gold 30 Silver Limited Supply (1)
Soolie Berryfizz - Ironforge 1 Gold 30 Silver Limited Supply (1)
Vosur Brakthel - Ironforge 1 Gold 30 Silver Limited Supply (1)
Fire Protection Potion
Apprentice Honeywell - Hillsbrad Foothills 13 Silver 50 Copper Limited Supply (1)
Jeeda - Stonetalon Mountains 15 Silver Limited Supply (1)
Nandar Branson - Hillsbrad Foothills 15 Silver Limited Supply (1)
Free Action Potion
Kor'geld - Orgrimmar 18 Silver Limited Supply (1)
Kor'geld - Stranglethorn Vale 18 Silver Limited Supply (1)
Soolie Berryfizz - Ironforge 18 Silver Limited Supply (1)
Tally Berryfizz - Ironforge 16 Silver 20 Copper Limited Supply (1)
Ulthir - Dustwallow Marsh 18 Silver Limited Supply (1)
Vosur Brakthel - Ironforge 18 Silver Limited Supply (1)
Frost Oil
Bro'kin - Alterac Mountains 25 Silver Limited Supply (1)
Bro'kin - Hillsbrad Foothills 25 Silver Limited Supply (1)
Frost Protection Potion
Drovnar Strongbrew - Arathi Highlands 20 Silver Limited Supply (1)
Glyx Brewright - Stranglethorn Vale 20 Silver Limited Supply (1)
Hammon Karwn - Arathi Highlands 18 Silver Limited Supply (1)
Skuerto - Arathi Highlands 20 Silver Limited Supply (1)
Great Rage Potion
Hagrus - Orgrimmar 20 Silver Limited Supply (2)
Ulthir - Darkshore 20 Silver Limited Supply (2)
Ulthir - Dustwallow Marsh 20 Silver Limited Supply (2)
Major Healing Potion
Argent Quartermaster Hasana - Tirisfal Glades 36 Silver Limited Supply (4)
Argent Quartermaster Lightspark - Alterac Mountains 36 Silver Limited Supply (4)
Argent Quartermaster Lightspark - Western Plaguelands 36 Silver Limited Supply (4)
Quartermaster Miranda Breechlock - Eastern Plaguelands 36 Silver Limited Supply (2)
Evie Whirlbrew - Winterspring 1 Gold 50 Silver Limited Supply (1)
Evie Whirlbrew - Badlands 1 Gold 50 Silver Limited Supply (1)
Major Mana Potion
Argent Quartermaster Hasana - Tirisfal Glades 36 Silver Limited Supply (4)
Argent Quartermaster Lightspark - Alterac Mountains 36 Silver Limited Supply (2)
Quartermaster Miranda Breechlock - Eastern Plaguelands 36 Silver Limited Supply (1)
Nature Protection Potion
Alchemist Pestlezugg - Hillsbrad Foothills 20 Silver Limited Supply (1)
Alchemist Pestlezugg - Tanaris 20 Silver Limited Supply (1)
Alchemist Pestlezugg - Swamp of Sorrows 20 Silver Limited Supply (1)
Alchemist Pestlezugg - Tanaris 20 Silver Limited Supply (1)
Bronk - Feralas 20 Silver Limited Supply (1)
Bronk - Stonetalon Mountains 20 Silver Limited Supply (1)
Glyx Brewright - Stranglethorn Vale 20 Silver Limited Supply (1)
Logannas - Feralas 20 Silver Limited Supply (1)
Shadow Oil
Bliztik - Duskwood 15 Silver Limited Supply (1)
Montarr - Thousand Needles 13 Silver 50 Copper Limited Supply (1)
Montarr - Blasted Lands 15 Silver Limited Supply (1)
Superior Healing Potion
Bronk - Stonetalon Mountains 10 Silver Limited Supply (2)
Bronk - Feralas 9 Silver Limited Supply (4)
Evie Whirlbrew - Winterspring 10 Silver Limited Supply (4)
Evie Whirlbrew - Badlands 10 Silver Limited Supply (2)
Logannas - Feralas 10 Silver Limited Supply (4)
Logannas - Stonetalon Mountains 9 Silver Limited Supply (2)
Nina Lightbrew - Blasted Lands 9 Silver Limited Supply (2)
Rartar - Swamp of Sorrows 10 Silver Limited Supply (2)
Ruw - Feralas 9 Silver Limited Supply (3)
Thultazor - Swamp of Sorrows 9 Silver Limited Supply (2)
Superior Mana Potion
Ulthir - Darkshore 1 Gold 20 Silver Limited Supply (1)
Ulthir - Dustwallow Marsh 1 Gold 20 Silver Limited Supply (1)
Transmute Mithril To TrueSilver
Alchemist Pestlezugg - Tanaris 80 Silver Limited Supply (1)
Alchemist Pestlezugg - Hillsbrad Foothills 80 Silver Limited Supply (1)
Alchemist Pestlezugg - Swamp of Sorrows 80 Silver Limited Supply (1)
Just a reminder that all of these limited supply items listed above are recipes. If you were to search the auction house for these remember to put Recipe: in front of it. (Example: Recipe: Transmute Mithril To Truesilver) That is all I have for the alchemy limited supply vendors. If you have more or you see an error in this list please let me know so I can update this guide.
