Lost the grommet that goes around the lock button in the door of my Cooper.  Good opportunity to design and print my own.  Took a little effort, but, it fit.  I only printed in PLA the first time - not to remove, and replace with PETG version, that will be a little less prone to melting in the summer.  It was a bit tight around the lock button, so, you may need to increase that hole a bit, but, it fit the hole in the door trim.