SDF-1
myminifactory
Found this file on my pc. Not sure where it came from but i kind of cleaned it up in meshmixer.
Download Model from myminifactory
With this file you will be able to print SDF-1 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 SDF-1.