Amazon Fire Stick 4K - Where does one buy these in NZ?

Hi - Does anyone know where to buy an Amazon Fire Stick 4K from in NZ?

Closest I found is MightyApe which says "Advanced Edition" which is not an actual model but after checking with them, they are not convinced its the 4K model even though its in-line with what the price should be.I see they have the cube.

Any other ideas?

Thanks