In the process of creating my own panel, I have found some great sites that I thought would be helpful for anyone else interested:
http://home.att.net/~sfinger/products.htm
http://www.simpits.org/database/graphic ... anel1.html
http://www.flyingzone.co.uk/index.html
http://www.b737.org.uk/aircraftsystems.htm
http://www.artietheairplane.com/main.html
http://www.tech.purdue.edu/at/courses/at262/
http://www.gecas.com
http://www.sasflightops.com/gallery/A321/A321_01.htm