New Trackball Replacement for LOGITECH CORDLESS OPTICAL TRACKMAN T-RB22 Mouse | eBay
A size comparison between the Logitech Cordless Trackman Optical, the Microsoft Trackball Optical, and the Elecom Huge, for if anyone is curious. : r/Trackballs
Logitech Cordless Optical Trackman - Office Depot
Logitech Cordless Optical TrackMan : LOG-910-000810 : The Keyboard Company