US Robotics Modem 56k "Sportster Flash" - from circa 1995 : r/vintagecomputing
Amazon.com: US Robotics 56K USB Soft Modem - Fax/Modem (USR5639) : Electronics
Amazon.com: StarTech.com USB 2.0 Fax Modem - 56K External Hardware Dial Up V.92 Modem/ Dongle/Adapter - Computer/Laptop Fax Modem - USB to Telephone Jack - USB Data Modem - Network Fax/CMR/POS (USB56KEMH2) :
US Robotics USR3453B Courier 56K Business Modem with V.92
Best Buy: U.S. Robotics 56K V.92 External Data/Fax Modem USR5686E