Amazon has a large number of media players you can use for your digital signage, depending on your budget, goals and scale. Visit Amazon’s official page here https://www.amazon.com/Amazon-Fire-TV-Family. Or contact any retailers that will consult you on where to buy Amazon Fire TV.
* Be aware that Kitcast for Amazon TV sticks are currently in Beta so it might work unstable. Should you notice that, please report it to our support team