I modeled this attachment for my Ego blower to clean out the roof gutters while standing on the ground.  It has a flat surface for the build plate.  I printed this without any supports.  It is 219mm tall.  This nozzle points to the left, but if you prefer it to go right you could mirror it in the slicer.

The latch is attached with a 3mm bolt and nut.  The latch hooks onto the tab of the Ego blower tube and keeps it from coming off.  There are two pockets in the latch in which I installed two springs.  The two springs I took out of ink pens.  I chose to use ink pen springs because they are easy to find.