In my neighborhood they're like this.
advance auto parts does offer such an item in store. Stant Consumer CAP GAS LOCKING STANTPart Number: 11510 $19.88 pretty sure that is what your looking for
goto enter make, model and year and then based on engine it will give you three options. They are 19.95 plus shipping. Good luck
Counting the seconds between each lightning flash tells you nothing except how intense the storm is. What you count is the number of seconds between when you see the flash and hear the thunder. Sound travels about 1100 ft/second at the Earth's surface, so you divide the numer of seconds by 5 (5280 ft/mile) to get how far the storm is from you.
Autozone should have one or order one for you