After having searched through Sears, Autozone, Walmart, AdvanceAuto, et. al., it looked like the
only way to get an E11 was to order on-line. But, I didn't want to wait that long. So, I tracked down
the Snap-On truck and bought one from him. If you can track down a Snap-On tools or Mac-Tools truck, they will most likely have just what you are looking for. Pay the man on the truck and you are on your way.

Good Luck,

Coyote