I took the models from Samael_ for the two spool halves. I noticed that there were two bodies in each stl. I aligned the bodies better, merged them, and then I cut out center holes to better mimic a spool of filament.
I recommend concentric top and bottom surfaces when printing these and the filament roll.
I feel like a slight chamfer is needed on the edges, I might add that later.
***Shameless self promotion***
I also remixed Samael_'s box design to make some improvements and make it slightly smaller:
https://www.printables.com/model/517782-mini-filament-spool-swatches-box-remix
The author remixed this model.