Door guide
thingiverse
I just tossed this together to separate a couple of sliding doors after I installed a new vinyl floor. It's nothing special and might not work for you, but someone asked me to share the model... so here it is.
Download Model from thingiverse
With this file you will be able to print Door 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 Door guide.