Amazon.com: KDO 6 Key macropad with knob Mini Custom keypad 3 Layer Setup programmable Keyboard with 8 GB U Disk (Built-in Setup Program) Plug and Play Mechanical Keyboard for Windows PC Laptop :
Amazon.com: Cuifati 6-Key Mini Keypad One Handed Mechanical Gaming Keyboard, Multifunctional Shortcut Programmable Macro Keyboard, with Knob, Plug and Play, for Windows, for Vista, for Linux, for Macos : Electronics
guide] I made an Instructable for my 6 Key Macropad : r/MechanicalKeyboards
Amazon.com: GOWENIC 6 Key Macro Pad, OSU Keypad Mini Gaming Keypad with Knob USB DIY Programmable Keyboard OSU Keyboard for Gaming Office : Video Games
Mini 6-key Copy Paste Mechanical Keyboard USB Programming Keys DIY Shortcut P4I0 | eBay
IC] 6key Macropad
Would something like this be able to control a 6 key macropad? : r/MechanicalKeyboards