I am pleased to announce that we made our standard templates for A3 reports available as a free download from Modelus.com website: http://modelus.com/Products/A3Templates.aspx.
Earlier this year, I have reviewed Managing to Learn by John Shook and Understanding A3 Thinking by Durward K. Sobek II and Art Smalley. Both of these books have been highly influential on the design of the templates. Check them out.
Enjoy!