PLEASE help me find a MS Laser Mouse 6000 (NOT wireless!!)

Yes, I’m particular… but I LOVE the Microsoft Laser Mouse 6000 USB WIRED mouse. But, Microsoft has quit selling it! :( I use the wheel mouse a lot, but mine has been acting up for well over a year now, and it’s driving me a bit nuts. I’ve taken it apart several times and cleaned it, but it’s a mechanism problem, not dirt. I love it because it’s a 5-button mouse, and since I do so much on the web, I use the side buttons for "back" and …