The author remixed this model.
This is kind of a remix as I designed the part from the ground up because I needed to change the dimensions to fit a smaler type of cable in a wider hole.
In the freecad file is a varset where you can change the parameters of the part to fit your needs.
I used a 0,2mm slit instead of the 0,1mm from the original and still had to cut slightly. At the moment I use a 0,6mm nozzle.
Don't mind the discolouration, I printed with black ABS before and forgot to brush resude of the nozzle.
I printed the grommit in 85A semisoft TPU from extrudr.