Buy Windows 7 / 8.1 SigmaTel 4200 Chip U2-Irda Wireless Fast USB 2.0 Infrared Dongle (FIR) With Plug-and-Play for Point-and-Shoot Device Support Integration with Digital Camera, Hand Scanners, Laptops, and Cell Phones.
IrDA/USB Bridge (Deltron - SigmaTel)
USB IrDA "mini" Infrared Adapter
media center - Is USB IrDA adapter enough for a TV-remote to work? - Super User
Zoll USB IrDA Adapter – MEDwheels Inc.
Download and install SigmaTel, Inc. SigmaTel USB-IrDA Adapter - driver id 1439866
USER'S MANUAL USB TO IrDA ADAPTER
AdapterZ.com - USB-to-IrDA Dongle Adapter (standard & high speed)
BAFO IrDA USB Driver CD with mobile phone suites like Nokia PC Suite 4.5a : Sigmatel : Free Download, Borrow, and Streaming : Internet Archive