Where would I be able to find the Factory Bundles for Dell Chromebook RMA Shims?

Hello, I'm attempting to find the Factory Bundles for the RMA Shims for Dell's Chromebooks. I'm having a bit of a hard time finding them, and I'm wondering if there is a repository that Dell has, or if maybe there is somewhere on Dell's sight that I just haven't seen yet. Any help would be greatly appreciated.