Optical Mouse Sensor Supplier

Hi All,

I have been looking around for suppliers of Optical Mouse sensors that I can use for an Arduino project. Not having any luck at this stage...

Sparkfun use to have a kit but the sensor has been discontinued. Had a look on Digi-key but they want you to call them if you want to order some.

Any ware else I could look?

I am not even sure if you call it Optical Mouse sensor... Any information would be appreciated. Thanks.