Javnir Nashak
Found in Durotar.
Durotar
Item Stock Price 
Blue Firework∞ 20 
Green Firework∞ 20 
Red Firework∞ 20 
Red Streaks Firework∞ 50 
Yellow Rose Firework∞ 40 Quest Level Side Honoring a Hero 60 Both Quest Level Side Honoring a Hero 60 Both Zone Spawns Coordinates Durotar 1 46.1, 13.8