Does anyone know where i can obtain an NEC hi-lite guide. I used to get them when From my instructor when I was an apprentice (over ten years ago). Now that I am an apprenticeship instructor I would like to either make them available to my students or at least point them in the right direction to get one.

If it costs something thats fair enough. I know of one company that sells a pre hi-lited codebooks, but because I teach 3rd & 4th year all my students already have codebooks.