This one has a fixed central support and an adjustable arm on each side, with each mount ... should fit pretty much any desk, but there’s also a kit for Grommet holes if that suits your needs ...

Multiple Installation Options: We provide both C-clamp and grommet kits. The C-clamp allows for desk up to 3.1 inches thick. The grommet base supports desk up to 1.6 inches thick. Fully Adjustment ...