no

Orichalcum can be found in chests, or getting a premium capsule from a Bulky Vendor heartless. Orichalcum+ can be found in chests, and after completing certain parts of certain worlds.

The Latin translation for Brass is Orichalcum.

In the Kingdom Hearts II video game, the Ultima Weapon may be synthesized by obtaining all seven Orichalcum+ items, along with Serenity, Mythril, Dense, Twilight, and Energy Crystals. In game, the recipe for Ultima Weapon requires thirteen Orichalcum+, but by using an Energy Crystal, this reduces the amount of needed materials to seven.

If you're talking about the vending machine heartless, no. Orichalcum plus is only found from treasure chests, the big treasure chests where you throw your keyblade when you open it. But you can get Orichalcum from them, the normal ones.