The point of that is that there is only one artisan level trainer for each tradeskill in all the world for each of alliance and horde. Afterall, if you have gone past mere mastery and have become an artisan, you are not supposed to be terribly common. The alliance artisans are thus:
Alchemy: Ainethil, Darnassus
Blacksmithing: Bengus Deepforge, Iron Forge
Cooking: A quest in Gadgetzan, Tanaris
Enchanting: Kitta Firewind, Elwynn Forest
Engineering: Springspindle Fisslegear, Iron Forge
First Aid: Nissa Firestone give a quest, Ironforge
Fishing: A quest in Iron Forge
Leatherworking: Telonis, Darnassus
Tailoring: Dustwallow Marsh
Mining, Skinning, and Herbalism are gathering professions, so there are no "Journeyman" or "Artisan" levels or such. Any trainer for these jobs can teach any level.
I hope this helps.