Iam just looking for this! Perfect. but can you add some sizes? looks perfect for mine :)

PS: never mind. ive printed this. its fits so damn perfect! big like! (edited)

Sovol SV05, Jayo PETG Black, 0.2 layerheight, no supports. Fit without any issues at all. Third try was a charm (all oopsies my own fault): first time I lost bed adhesion half way through, second time I used organic supports (Prusaslicer) which ended up inside the ducts, where I couldn't clear them out.

Works like a charm.
Printed in eSUN PETG White

Nice easy print, got one done, printing a second one for the SV05 I wrecked so when the two parts I need come in I'll be ready to go.

Upgraded my SV05 and used this extension. The petg is from Zyltech and printed on my N4P.