I designed an organizer to hold my 4 piece TEKTON Pick and Hook set in my toolbox. Should be easily printed with supports on the shelled out surfaces.
Designed to fit this set, though may work with similar geometries
https://www.amazon.com/TEKTON-6943-Precision-Pick-4-Piece/dp/B000NPPBQK/ref=sr_1_3?keywords=tekton+pick+set&qid=1566103261&s=gateway&sr=8-3
I have had some comments that it didn't fit their picks. It seems that the Tekton picks vary a bit in size, so you may need to scale/adjust dimensions accordingly