Factory Xtreme body parts. Where to get them?

Hello. I have an 03' GMC Sonoma. I want to add on the Xtreme ground effects. Can I buy them at Chevrolet/GMC? Or is there another source?

Thanks,
Marshall

Dealership or boneyard.

Cool thanks.

My other question is, will the Xtreme parts fit on the GMC model. I know that the Xtreme package was only avaliable for the Chevy model correct?

They'll fit, but you may have to drill a couple of holes for the bottom portion along the kick panels. And make sure you use 3m double sided automotive foam tape on top of it. It may seem silly, but it's used on the factory due to how strongly it re-enforces it.