I needed a clamp for my Ikea Skadis as I did not want to screw it to the wall so, as I wanted to design it myself (to save some money and also have fun) I made it universal so that I could snap fit anything I need to clamp in the future. I hope it's helpful for you too!
The current clamp with screw model is suitable for 50 mm thick desk, if you need different sizes I am uploading the step files so you can modify it to suit your needs.
I recommend printing the slim screws sideways so that layer lines don't align with the direction of the tension applied to them. The main screw is alright to print it standing up. The .3mf file is correctly oriented.