iOttie XL One replacement part maybe other models

thingiverse

This is a substitute for the center button. Internally, it's held forward by a spring. Place your device in "ready to load the phone" mode to release the side springs when disassembling. Pro tip: Applying a tiny amount of petroleum jelly on the flat internal surfaces will make it like new. Mine has been 4 years old... still working well after the cap had popped off this button. To create it, print a large number of walls to make it solid (6 walls, 4 bottom and 4 top layers @ 0.24 height in ABS for me). Don't use PLA! It gets too hot in a car and will re-soften. PETG, ABS, ASA, Nylon variants are recommended. Fusion 360, STEP, and STL files are included.