grommet thingy
thingiverse
This is just a casual side venture, not too complicated, and really doesn't warrant a lot of discussion.
Download Model from thingiverse
With this file you will be able to print grommet thingy with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on grommet thingy.