My son lost the clip for his bicycle helmet. Replacement was hard to find and expensive with shipping. So I quickly designed a replacement. Not streamlinded at all, so also no .blend file this time. I bet you can come up with a better design.
Printed in PETG. I have no doubt it will perform like the real one feels very good in place.
Das Filament PETG PETG
There is a bridge in that part but its so short every printer halfway dialed in should do it without sagging.
Light sanding for comfort and get rid of some sharp corners.