Here are some sites that offer free christian clipart and graphics.
http://www.christart.com/
http://www.fci.crossnet.se/
http://www.seriousd.com/clipart.htm
http://clipart.christiansunite.com/
http://www.freecc.free-online.co.uk/
http://www.fillthevoid.org/clipart/free-christian-graphics-main.html

http://www.christianet.com/free/clipart/
http://www.christianfreebies.com/clipart.shtml