Brother DS-940DW Duplex and Wireless Compact Mobile Document Scanner - Walmart.com
Duplex Portable Scanner
Xerox Launches Affordable Duplex Scanner for Mobile Users | Xerox Newsroom
Epson WorkForce DS-7500 - Document scanner - CCD - Duplex - Legal - 1200 dpi x 1200 dpi - up to 40 ppm (mono) / up to 40 ppm (color) - ADF (100 sheets) - up to 4000 scans per day - USB 2.0 - Walmart.com
Epson Workforce ES-300W Wireless Duplex Mobile Document Scanner Black ES-300W SCANNER B11B242201 - Best Buy
Amazon.com: Fujitsu Document Scanner - Duplex - Ledger - 600 dpi x 600 dpi - up to 90 ppm (Mono) / up to 90 ppm (Color) - ADF (200 Sheets) - up to 15000 scans per Day - USB 2.0, SCSI - refurbished : Office Products