I had the tiger looking symbol from the Privateer Playtester's guide scanned and made into a decal for my car. It sits on the top of the windshield. I also made up a security sticker for the side windows of the car also.
http://www.telusplanet.net/public/rhum/wcdecal.jpg
http://www.telusplanet.net/public/rhum/wcsecurity.jpg
http://www.telusplanet.net/public/rhum/wcdecal.jpg
http://www.telusplanet.net/public/rhum/wcsecurity.jpg