Hello there! I am new here and i came from Taiwan. For you guys who has 3D printer or friends with 3D printers. I've made some 3D printed iSine earhooks replacement with PLA material. The measurement was took from the original ones so consider them replicas. https://www.thingiverse.com/thing:3277948 The difference is that you can adjust the shape to fit your ears by applying some heat like hot water to the PLA material. I've used them for months and they even fit better over time because PLA slightly shapes with body temperature. i also made a neckband for iSine. it's kind of experimental and I have not tried it for a long time. https://www.thingiverse.com/thing:3273561 Maybe you guys would be interested to print it out, have a try and perhaps share your thoughts.