This is just a quick remix of the original 120mm fan cover set (https://www.thingiverse.com/thing:304432)
Should work fine on Fractal R5 as well, and may be other similar sized Fractal cases.
Printed with Ultimaker PLA Black with 0.2mm resolution, default preset.
Fractal-Moduvent-140mm-adapter1-back.stl | 28.9KB | |
Fractal-Moduvent-140mm-adapter2-middle.stl | 26.3KB | |
Fractal-Moduvent-140mm-adapter3-front.stl | 29.6KB |