Help me find a KVM!

Okay so I have 2 computers, a PS2 keyboard, and a USB optical mouse. I want to be able to hit a button and switch the keyboard and mouse from comp to comp. I do not need/want audio/video on the KVM. Just a PS2 for keyboard, and USB for mouse. I have 2 monitors one for each comp, so I dont need the KVM to be able to switch the monitors back and forth. I have been searching and searching for days and havent been able to find what Im looking for. Maybe someone here can help me...