Fixing curb rash on silver Carrera S rims?

I curbed my rims a long time ago and wanted to get it back to lookin spiffy. I called a wheel refinishing shop around LA who told me that they could NOT repair the rims with the OEM silver color (citing all of USA does not have access to the color). I was wondering if anyone else ran into this hiccup or can confirm if that statement is true. If it is, are my only options to refinish my entire wheel set in a new color?