They have aftermarket kits for this type of thing. I saw one in the most recient policehq.com catalog. Its designed for use on squad cars. I would post a link, but unfortunately its blocked at work.... :( The camera can be mounted in the grill or on top of the car on the light bar (unfortunately camaros dont have light bars... yet).
"I thought you didn't give cute girls speeding tickets?"
"I don't..... here's your ticket..."
2 wrongs don't make a right... but 3 lefts do!