I was able to go to the a local hardware store and find automotive trim hardwear. I found the anodized black in the lengths I needed. You have to look around at the different stores, but I found that ACE Hardware has a pretty good selection of automotive stuff.
Yup, they're suppossed to be silver. You won't notice them once they're in. My entire interior is black, including dash pad and dash pad trim. I've never really paid much attention to them, and haven't noticed the screws 'standing out'.