I have a cheap soldering iron that was falling all the time so I needed a cheap holder. It has been printed whitout support, with PLA at 0,2mm. I added a screw on the side to keep the brass wool in place. Another tweak is to use hook-and-loop fastener with double-sided tape on both U and iron's handle. It works fine so far. FreeCAD file available for modifications. Enjoy :)
24/08 : added holes for screw
The author hasn't provided the model origin yet.