Hey, Banjoman — good to see you on the 'Cat. Missed your posts.To your questions, take a run to Elderly and look through their selection. Don't know what your pupil's playing level is, but if he/she has any expertise at all, both Happy Traum and Stefan Grossman have good tablature books; the latter have CDs in them so you can hear the songs while you're looking at the tab. I personally think it's the best way to learn blues — or anything else.
david