240's are s'posed to have wheel covers with the centers painted to match the body color. I think these are more attractive than the alloy wheels.

I've picked up a few spare wheel covers over the years...mostly used. When the car goes into the shop for a spot of painting, I ask the guy to also paint the covers to match.

Performance Products carries plain, unpainted covers very reasonably priced, likely other types of wheel covers, too.

Good luck