Adesso WKB-3150UB - Wireless Ergonomic Keyboard with Built-in Removable Trackball and Scroll Wheel, Split Key, Long Battery Life, Small and Portable -Compatible for Laptop/Desktop/PC/Windows XP/7/8/10 : Amazon.ca: Electronics
Split Keyboard With Trackball - Etsy Canada
Cocot46plus
This modular keyboard includes a dial and trackpad for peak productivity
Trackball Split Keyboard Will Roll Into Your Heart | Hackaday
Oddball - a split keyboard with trackball
Photos] Split Keyboard and a Trackball : r/MechanicalKeyboards
IC] OPERATOR | A split ortho mechanical keyboard for Photo retouching