Sticker Dilemma

So I bought a new phone to replace the one I lost the other day. My biggest concern sadly was what new sticker to apply to the back of it. For some reason I have to indicate some kind of nerd affiliation on my cell phone. I mean, I don't wear comic emblem T-shirts, I don't go to comic-cons, I don't adorn our car with a big Bat symbol or anything, but I do have to do something small or subtle to feel like a geek in the outside world.
My geek was coming up short in trying to think of something this time though. There are a couple of great choices that unfortunately I can't find in vector form, which I need to make my stickers on my plotter.
Brands of the World is my usual source (also for corporate logos), but I think I've exhausted their supply of inspiration. My last sticker, the Legion of Superheroes symbol, I had to draw myself in Illustrator. A couple of the ideas I had this time -- the Klingon Empire emblem, the Rebel insignia from
Star Wars -- I figured would be too hard to recreate. I ended up reluctantly picking the logo for the Bureau for Paranormal Research and Defense from
Hellboy. I say reluctantly because I already own a hat with that logo on it, and it seemed repetitive.
At the last minute (the last few minutes before my work day was done) I instead thought of another cool law enforcement agency that I could represent, the Strategic Hazard Intervention, Espionage and Logistics Directorate, or S.H.I.E.L.D., led by Colonel Nick Fury. Which ended up being just as hard to recreate as my other choices, but still.

Geek accomplished.