Hey guys, I need help with finding one of the following optical mouse ICs:

1) ADNS-2051
2) ADNS-2610
3) PAN3101

These are not available in the market or any Indian website. They can only be obtained by  opening an optical mouse. So far I've checked 6 optical mice (4 chinese, 1 Logitech, 1 Microsoft) but without success.

So here's a request for all forum members...
Could you please open the single screw of your optical mice and check whether they have any of the above ICs?
I just need to know which brand and model has one of these ICs. I'm tired of purchasing new mice now! 

I've attached pics of the above ICs.

These are mostly found in Logitech, Microsoft, Navigate, I-ball and many cheap mouse brands.   

what are you using them for ?

Robot odometry...