11-06-2012 01:51 AM
There is usually a link to "Replacement Parts" on the product pages for your device.
If not, then you may have to put in a call to the local support office.
You aren't likely to get advice beyond that here. It is not an official support channel.
M570, Cordless Trackball | Cordless Trackman Wheel | T650 Touchpad | M235
K800, K480, K360, K340 keyboards
Webcams HD Webcam C625; QuickCam Pro 9000 | H600 headset
SetPoint: 6.67.82 | Driver version: 5.90.41 | LWS 2.51