i would just string it and buy the length you need plus a couple feet just incase. i would get it local too, probably cheaper and you can get all the little bs fittings too instead of buying the kit with stuff you might not need.
fyi, that cut off switch doesn't have the required decal. i'm sure kirk can cut one though. its a rebranded flaming rivers switch though for a nice price. not bad!
http://www.flamingriver.com/index.cf...prod/prd66.htm
if you are worried about people turning your car off at lights or whatever you drunken college kids do.