One of the three bolts on my Schaefer desk organizer has stripped threads and is lifting out. My first thought was to replace it and secure it with a flat washer and nut from below. Only two of the three bolts are accessible from below and, unfortunately, the one that needs replacing is located within a structural beam. There is no imbedded nut and/or plate visible from above. Can anyone offer a constructive solution for securing the organizer?