I got ones that look like these https://www.amazon.com/Headphone-Headphones-Adjustable-Universal-Umbrellas/dp/B08JPGY4PV
but I just saw this one where you can pivot the hook to face towards your monitor too, that's neat I guess. https://www.amazon.com/Headphone-Headphones-Adjustable-Universal-EURPMASK/dp/B07BVK2FQW Although I'm concerned the spring will wear overtime and not hold the headphones up as well as a good ol' fashioned screw clamp like the first link. Bonus to the first one is you can pivot from a horizontal clamp, to a vertical clamp if, say you want to instead clamp it to a squared off table leg, or a waterfall edge.
//edit
actually it doesn't look like the first link you can pivot it. anyways, mine can but you get the idea. They may not even sell these exact ones where you live but something like it.