I'm not as familiar with the
Ibiza as I am the Leon, but I'd say TRC Splitter, side splitters (or skirts) if they do them, debadge the Cupra lettering front and rear or get
@Tony Thurston ay AT Designs to make you some in black/anthracite. Wrap the front and rear S's. Get the wheels painted anthracite (not black you lose the detail in the wheels).
Maybe colour code the wing mirrors to match the wheels. Or even go for colouring the front and rear S's in the same colour too (or just match the wing mirrors) to tie it in.