Within two days of release, the new LEGO Monsters Series 14 Minifigures are now sold out at LEGO Shop at Home North America (USA | Canada). Looks like these minifigures are very popular and that’s to be expected considering Halloween is just around the corner! More minifigures should be in production, but in the mean time, the best way to get a hold of these minifigures would be at your local LEGO Brand Store or big box retailer (Wal-Mart, Target, Toys R Us, Barnes & Nobles/Chapters).
LEGO Shop at Home still has the seasonal LEGO 40122 Trick or Treat set instock for $9.99 USD / $11.99 CAD though!