I have mounted two radial fan on my printer as a part cooling solution.
As you can see, the fan has input on the left side and blows air down. Does a mirror construction exists? With outlet on the right.
I can even print my own casing, but I'm not sure if the fan will work, if I change the rotation direction.
I'm using this print cooling fan duct: https://www.thingiverse.com/thing:1850163
The fan on the right side has the opening facing the hotend, and there is not much space, so the impeller can catch on wiring etc. If the right fan had opening to the right, there would be no such problem.