The sidewalls were the first parts I have build for my Boeing 737-800 cockpit. When you are starting such a big project it isn't easy to know where to start. So I was very happy that I could use the plans of Vidar Fagerjord. These are excellent references for your build and they come even with a full cutting plan.
He has removed the plans from his website but he has given me the permission to add them to my downloads so I can make them available to you. Please keep in mind that these are free plans and you are not allowed to sell them anywhere.