Hawking Tech USB to PS2 Adapter - HU2PS2 $12.99

The Hawking's HU2PS2 USB to PS/2 Adapter is easy to install and use. It supports two PS/2 Devices (Keyboard and Mouse) and Converts them to a USB Interface. It also converts the PC PS/2 port of KVM switch to a USB port.

Buy.com is carrying this USB to PS2 Adapter for $12.99