Enlarge Fabia III Montecarlo rear spoiler

Hi!

I plan to give the spoiler of my Fabia Montecarlo 2017 a more aggressive touch. And I have seen that on pages like AliExpress or eBay there are universal rubber and fiber spoilers but I don't see that any of them fit since the shape of the montecarlo's spoiler is something peculiar.

Is there one that allows me to enlarge it a bit? Or for some other skoda model that fits mine? Something like the photos that I put here.

Thanks!