Plans for building a 1 or 2 seat autogyro are sought after, with the user expressing difficulty finding comprehensive resources online, only encountering model plans. Recommendations include visiting the Rotary Wing Forum and the PRA website for detailed information. Additionally, there is mention of a large gyro gathering in Mentone, Indiana, happening next weekend. Historical references indicate that Popular Mechanics previously featured many autogyro plans. Engaging with community forums can provide diverse insights and ideas for building an autogyro.