Inspired by this exhaust mount, I designed a variant from scratch so that the printer can be put closer to the wall, since I also have a filament holder on the side. There is now a 90 degree bend and a rectangular mouth so that it sticks out less towards the the back. Since printing and taking the pictures, I have refined the model a little, so take a look at the model for the final version. Hope you like it!
I suggest printing like shown in picture with painted on supports.
Included are the model files, so you can adjust if you think you can improve.
The author marked this model as their own original creation.