You can typically find this specific papercraft model on hobbyist repositories like Only-Paper or other scale modeling forums that host Russian Papercraft (RPModels) files.
Print the PDF templates on A4-sized heavy paper or cardstock for better structural integrity.
The file is a digital package containing templates for a 1:100 scale paper model of the Sud Aviation Caravelle 10R in Finnair livery. Unlike flight simulator add-ons, this "RPModels" release is specifically designed for physical papercraft assembly. File Details & Contents