Help broke a bolt!
Try a Harbor Freight or a NAPA. This is what you're looking for, if they have metric great.
http://www.amazon.com/gp/product/B00...&creative=9325
Trending Topics
The Best V8 Stories One Small Block at Time
If installing, were you using a torque wrench?
If not, get one in ft-lbs and in-lbs and torque all bolts...especially on an aluminum engine to technical specification.
Good Luck...should come out with an easy-out (Sears has them).

