This is a fitment I made for my oddly thick desk that I chose to have my 3D printers on. I made it parametric so others can use it as well!
Included in the downloads section of this file is a .f3d file. To make this work for your own desk, it's important that you change the dimensions of this model!
First, open the F360 file and navigate to the ‘Change Parameters’ tab. Then, under ‘User Parameters’, find the variables named the variables named DeskThickness and ClampDistance.

Change these parameters to the desired thickness of your desk, as well as the desired distance that the clamp will protrude onto the desk. Everyone's printer / desk is different, so find a tolerance value that works for you!
I recommend printing this out of PETG, as it may be a little bit grippier than PLA or others. Enjoy, and make sure to give some love to Line Arc Line's original model!
To download the clip for this model, go to https://www.printables.com/model/256896-skadis-t-clip-system
The author remixed this model.
This model was remixed from Line Arc Line's Skadis T-Clip System. This remix aims to allow the Skadis Peg board to be easily fit onto desks that do not fit the stock Ikea desk clamp. This model retains the stock Skadis T-Clip and extends the fitment piece into the clamp.