Ore, Mandrakes= Firecat Alley Mistwood= Unicorn Way, Ravenwood, etc. Cat Tails= Anywhere in the water Deep Mushroom= Dark Cave Ectoplasm= Ghostly areas Stone Blocks= Chamber of Fire [ I don't think that is the correct name]
I hope this helps! If you go to Mooshu, the Cat Tails are everywhere!
In the Grotto, I believe its Level 55 hats. In the Science Center, I believe its Level 55 coats On the plateau in Stormriven, Level 55 boots In the Crustacean Empire, some crab, Level 58 athame and ring In Base Camp, a few recipes like an amulet that gives one stacking Ice Blade card.
In my opinion, all the other craftable gear, by the time you can craft it, there's better gear available at the Bazaar.
I believe there is a a ring or athame available from the lady near the Bazaar that gives power pips, that's not bad for level say 6 to 10. It might be good if you are low level PvP and want to STAY low level, but for PvE, just save your gold until you get to level 15.
And in my opinion, Grizzleheim Northguard, because that is where you get the recipe for Watchtower Hall. Might get some disagreements on that one.
Oh and one more. I can't tell you where, because recipes disappear from the vendor after you buy them, but its the recipes for cereal pet snacks, I think its on Dragyonsypre in the Antheneum. Your pet will "Love" the snack from its school. Get a "4" on a pet game, and "8" from the snack, or a total of 12. That means you only ( :-) ) need to do 84 passes through the maze game to go from Ancient to Epic.
Oh good grief, another. Mortis, the Death Tree, in Nightside, has the recipe for treasure card version of Feint. Very useful, but only Death can purchase it.