[brusk]

You local auto-part store should have a decent selection of tire repair kits. Even BMW offers a repair kit from what I've heard of a pump that can inflate a goo of sorts to fix any hole. The professionals disagree with any of these methods as the goo can cause a balance problem and the external tire plug can see problems as well but when your on the side of the road that's a better an cheaper alternative that a tow and a tire shop plugging it from the inside which is what they consider the better method.