I used A high security "Best" cylinder. I turned the face to bevel it. I milled two large flats on the body to create a "double D" shape. I then made a template and enlarged and reshaped the existing hole with a dremmel and carbide burr. I took the old actuation shaft off of the original lock and drilled the shaft of the Best, and joined them with a cotter pin. I re-tapped the back of the lock body to accept 1/4-20 and used the collars and plate that came with the cylinder to secure the back.
Ill use seam sealer when I reinstall the lock after paint for the water issue.
Ramenth,
I watch mythbusters too, the problem here is that there is almost two pounds of bronze surrounding the core, this one wont shatter:-D
Look if you want in the car badly enough youll throw a brick through the window. And yes a locksmith can still get in but this just makes it take more time.
Andrew