2019 718 side intake grilles

[Norman May]

Hi everyone, just needing some advice on adding side intake grilles to my recently acquired  Cayman 718. I have found a supplier in the US, (Radiator Grille Store) but does anyone know if a similar product is available locally? 
The grilles pictured look fine, but pricey with USD exchange rates,

And second part of my question, are the grilles necessary’s?

Thanks in anticipation,

Edited 11January, 2024 by Norman May
Added question