I found this little thing just sitting on a shelf in the Garage. Plenty of room inside for the Registration, Proof of Insurance and emergency contact information. Plus a couple of extra zip ties to put it back in there securely.
That would work. I have a battery box in my bike, I put a copy of registration, proof of insurance, copy of drivers license in a ziplock baggie and put it beside the battery.
I like that idea Denny. That way you don't have to worry about a ziplock bag ripping or getting holes from the bike bouncing thousands of times on a ride. It sucks when you get a hole in the bag and then get your papers wet when washing.