Filament guide
thingiverse
Just made a version where you don't need a metal bearings, print, click and go... you can get the bearing here https://www.thingiverse.com/thing:53451
Download Model from thingiverse
With this file you will be able to print Filament guide 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 Filament guide.