Creative 5.1 Channel External Sound Cards for USB 2.0 for sale | eBay
Amazon.com: Creative Sound Blaster X4 Hi-Res 24bit/192kHz External USB DAC and Amp Sound Card, Super X-Fi, Multi-Channel, 7.1 Discrete Surround, Optical-in, Optical-out, Line-in, Mic-in, Headset-in for PC and Mac : Electronics
Creative Worldwide Support - live! 24-bit external
Creative Labs Sound Blaster Live! 24-bit External USB Sound Card at TigerDirect.com