I wanted to replace sliding patio doors with french doors, but didn't have the room for the doors to open. I went to my local salvage yard and after months of searching I found 4 smaller narrow french doors that I hinged together myself. It wasn't very hard. I went to home depot for help figuring out what type of hinges to use. I framed out the door as you normally would. They look fabulous and cost a fraction of what you would pay if you could find a company that makes them locally.