US Robotics 56K USB Softmodem - Módem (56 Kbit/s, USB, T.31, FCC IC UL/CUL CE RoHS, Windows Server 2011/ Win 7/ Server 2008/ Vista/Server 2003/POSReady/XP - 32/64 bit, 0-50 °C) : Amazon.es: Informática
Best Buy: U.S. Robotics 56K V.92 External Data/Fax Modem USR5686E
US Robotics Modem 56k "Sportster Flash" - from circa 1995 : r/vintagecomputing