We have two, unboxed yet brand new, projector screens that were ordered for an install that didn't end up happening.  They were custom built so they are 50"x80" with a 94" diagonal footprint. They are electric recessed ceiling mounts, neither were ever installed.

Da-Lite Advantage Electrol Projector Screen - matte white -  94" diagonal, 16:10 aspect ratio

• Standard Silent Drive System to keep your screen whisper quiet (sizes up to 10’x10’)
• Standard Low Voltage Control (LVC) to keep your screen operation flexible
• Simple Installation with a new installation kit and user-friendly packaging to keep you on schedule
• Support includes a comprehensive five-year warranty to keep you confident in your purchase
• UL Plenum rated case
• White powder-coated case for a clean aesthetic
• Available with SCB-100 and SCB-200 (RS-232 serial control board) or Video Projector Interface (screen trigger) built into the case
• Decora-style, three-button wall switch
• Standard black backing retains projected brightness
• Seamless surfaces in all models