Where can I get these door sill plates?

Anyone know where I can get these? I've searched all through this forum and a few google searches, but didn't find anything. I don't really like this particular chrome style, though. They came on the Elise I just bought and had a couple small dings on them so I took them off. I'd actually prefer black, or even carbon fiber. If nothing else, I'll get a new set of chrome ones and paint them.