Couldn't find a top-fixing drawer that would hold a scanner under a desk top.
The Medium Cabinet Organiser (Howards Storage World) was the only drawer I could find that was deep enough. But it fixes at the bottom, not the top.
Fortunately the Carinya flat brackets (Bunnings) can be cut and folded to any shape you need. And Bunnings cut the MDF to the size I needed for the base, saving me the hassle.
Quick vid of the construction, showing how easy it is to shape the Carinya brackets:
Welcome to Workshop @Toxicroy.
Many thanks for sharing this project. It's a great idea to help save precious desk space.
Looking forward to seeing more of your handiwork on Workshop soon.