>NGeco Road Rotor Power2Max 4-bolt Shimano - 440€
https://www.power2max.com/en/product/ngeco-road-rotor-power2max-edition-set/

it is not that dramatically cheaper the assioma to be honest

On top of that
>Chainring R8000 34t - 15€
>Chainring R8000 50t - 72€