Shokz openrun brace/sleeve
My Shokz openrun headphones had broken at the joint between the connecting bar and the right earpiece, where the charger is. This brace/sleeve wraps all the way around so it has to be paused mid-print in order to insert the headphones to print the rest (see picture) I printed mine with a bambulab H2S which has the ability to pause mid-print. I paused the print when the tube part was printed maybe 70% through. Placing the headphones with the thinnest part on the print and taping it down makes it clear the print head so that there are no collisions. The rest of the headphones stick above the print level so make sure to orient the print so that the bulk of the headphones are pointed somewhere the print head isn't travelling to (in the H2S the head moves from the top left, bottom right, and top right corners, so I oriented the headphones to point towards the bottom left corner)
This is the first prototype that I made and it worked well enough for me. The thin part that wraps around the earpiece has some drooping because of the overhang that needed to be carved away before installing it, and the clearance from the charging port was quite tight so I had to shave it a little bit there as well. I have included the original rhino file that I used with the base geometry as well as a blender version so I invite you to develop the 3d model further.