"Microdesign" has released photo-etched meshes for MTO for T-72 and T-90 models in 1/35 scale from Amusing: In the kits, the fan mesh is not diagonal. Meshes for MTO on tank-72/tank-90 (catalog number MD 035605)
This is partial text from the full article (usually with photos) at https://armorama.com/news/meshes-for-mto-for-t-72-and-t-90-models