Do a search and there is a link that sells the sills. It's a dealership out of Iowa i believe. I just had mine installed last week. I didn't find them for less than about $350.00, which includes shipping. I paid about $150 for installation as I have no mechanical expertise and had my car in for an oil change. I know that was steep for those that have the know-how. In fact, those people just do it themselves. The printed directions are actually just illustrations and they made NO sense to me...but then again, I'm mechanically challenged.

I found the link:
http://crossfiredesmoines.com/crossfire_accessories.php

Iowa...and they shipped them for free...