The easiest way to find vinyl locally would probably be to go to an automotive graphics shop or possibly even a tint shop and ask them where to get it. They will know. You can get it on ebay but the price isn't great. You'll want at least a 4 foot length of it by at least 60 inches.
If anyone wants I own a vinyl cutter. Give me the measurements and I don't see why I can't do these for like $40 both sides shipped. Maybe even cheaper. I don't look to make a fortune but got to cover vinyl, transfer tape and shipping expenses. Plus can do many other graphics.
Sorry Cherryram my first post didn't go through. That is an awesome job for doing it by hand. I've seen worse come from some "pros" out there. I'm not out to promote but to help the little guy. Bought my cutter to do our own racing carts and got into some extra to help cover costs. It's paid for itself and I try to keep costs low for others. i like helping the little guy and not taking them for a ride.