Trio & Trio Max: Upgraded triple-screen laptop monitors by Mobile Pixels Inc — Kickstarter
Teamgee Portable Monitor for Laptop, 13.3” Full HD IPS Display, Triple Monitor Screen Extender, USB-A/Type-C Plug and Play for Windows Android & Mac, Work with 13”-17” Laptops : Amazon.co.uk: Computers & Accessories
DIY Project Valerie: BUILD YOUR OWN 3 Screen Laptop!! - YouTube