couple of suggestions.
Take a light to the auto parts store that has the help section (advance. oreily's, etc) if you would prefer new plugs. picked some up that way, but dont have the number anymore. should be able to match them with the light handy.
All wire joints exposed to the elements should be soldered, lightly coated with silicone, and then heat shrinked while the silicon is wet (will prevent shorting and also decay from water, salt, etc). solder and seal, you'll never have to worry about them. :)