DesignGlide Barn Door Hardware by Jeld-Wen can be installed in any standard-sized interior door frame in just a few steps to convert a standard door into a barn door—with no reframing or custom doors required. DesignGlide features a soft close and includes accent rails that attach to the top and bottom of a standard interior door. Prices start at $200 and vary by location. jeld-wen.com