At this time, no, because I am putting this out there as a "I made this, I don't have the time or care to do anything with it at this time, so I'll just leave this here for anyone who does" sort of thing.

Other people are welcome to produce some. It's also extremely easy to imagine - Black-plastic and Humanity themes are included with FileBox. If you're using FileBox already (and if not, why would you want this?), you have access to them and know what they look like. Just imagine the Humanity theme, but with the Black-plastic folders, and that's essentially all there is to it besides the exact appearance of the extra folder icons that were missing that I myself slapped together, and one of the .tar.gz files is literally just those icons, and downloading and viewing those in your image viewer of choice is only minimally more out of the way than seeing a screenshot.