I have been searching for a comparable extruder wheel, but all of them were too large for my direct drive configuration. Fortunately, I stumbled upon this one and chose to modify it to suit my extruder knob.
Direct drive bracket: https://www.thingiverse.com/thing:4784987/makes
Satsana fan duct compatible with 5015 and 4020 fans:
https://www.thingiverse.com/thing:4936172/comments
The author remixed this model.