Amazon.com: Stand Steady Flexpro Hero Power | Electric Standing Desk Converter/Desk Riser with Wireless Charging | Turns Any Desk into a Sit to Stand Up Desk | Integrated Phone/Tablet Holder (37.5 Inch/Black) :
VIVO Standing 32 Inch Desk Converter, Height Adjustable Riser, Sit to Stand, Dual Monitor and Laptop Workstation with Wide Keyboard Tray, Black, Metal, 32 Inch : Amazon.de: Home & Kitchen
RIF6 Adjustable Height Standing Desk Converter - 37.2 inch Wide Laptop Riser or Dual Monitor Workstation with Handles - Black - Walmart.com
MOUNT-IT! 48 in. Black Extra-Wide Height Adjustable Standing Desk Converter MI-7925 - The Home Depot