Where to buy Need a MARS Bar Now? Find a chocolatey fusion of caramel and nougat near you. Retailers Amazon (opens in new window) Walmart (opens in new window) Loblaws (opens in new window) RCSS (opens in new window) NoFrills (opens in new window) Voila (opens in new window) SoF (opens in new window) Instacart (opens in new window)