Just with a quick search I found http://www.goodcharacter.com/ which offers free materials. A lot of sites feature religion-specific materials, which could be a good or bad thing depending on your religion. ;-)
I've got an inexpensive choice "Parenting to build character in your teen" by Josephson, Peter & Dowd and a more expensive choice "In search of character" a 10 DVD set by Thompson & Rose Both are available from Boys Town Press http://www.boystownpress.org/Scripts/default.asp
