Project-G oil cap. Here's a link. $50obo It is only about 3 months old, and has maybe 150 miles on it (if that matters) and will clean up nicely, it's just dusty; it had been living on my son's car since I had a RetroModern cap replace mine, and he isn't into detailing under the hood. The cap is perfect though, and I'll get some better photos of it cleaned up later today:
http://i456.photobucket.com/albums/q...ps6cf8b0eb.jpg