Ace Magic Wand Factory
From the Super Mario Wiki
The Ace Magic Wand Factory is a factory that manufactures wands in The Adventures of Super Mario Bros. 3. It is apparently located in Sky World (due to the clouds and how the plaftform from the factory lowers to the ground after the messenger has the wand).
The only episode the Ace Magic Wand Factory appears in is "A Toadally Magical Adventure", where the Wizard King of the West requested a wand to be made specifically for him to roast sausages. After the 50 year time period, the messenger of the Wizard King of the West is sent to deliver the wand to the king. A wandsmith works inside the factory and claims that the wands he creates are made from the best minerals in the world. After receiving the wand, the messenger is escorted out of the factory into the Mushroom World by a plaftform for him to deliver it to the Wizard King of the West.