Delta Electrical - 250mm Side ducted ceiling exhaust

Designed for a friend quickly in tinkercad with Vernier calipers and the original part.
All I know is it's for a clip/cover for a 250mm ceiling mount exhaust fan (bathroom).
It's not a perfect copy, as I didn't round the closed back edge, but I think it should be ok.

This thing was made with Tinkercad. Edit it online https://www.tinkercad.com/things/gVLPYDhDbXE