I made a custom keyboard tray (with the help of some friends): DIY
Keyboard Tray With Vesa Mounting Hole 100x100mm For Diy Stand Working Keyboard Holder - Buy Keyboard Tray,Computer Keyboard Tray,Folding Keyboard Tray Product on Alibaba.com
DIY Keyboard Tray Made From Walnut and Leather -
How to Install a Keyboard Tray Track on a Crossbar Desk - ErgoDirect Blog
Keyboard Tray with VESA Mounting Hole 100x100mm for DIY Stand Working Keyboard Holder fixed with Monitor Holder Arm|wall mount|keyboard wall mountwall mount vesa - AliExpress
Build a Keyboard Tray with Reclaimed Hardware | DIY | Easy Desk Upgrade - YouTube
keyboard tray 3
Standing Keyboard Tray / Nightstand (DIY for $10) - Album on Imgur