So I was surprised no one made this file on thingiverse.com because I wanted an eye level recording instead of strapping gopro on my head which is too high.
This is made for Mobius Mini only. You secure it with tiny screws from the bottom.
The grip has a gap of 4.4mm, snap tight with my spectacle, yours could be different, use shim/spacer/double sided tape if you have a thin spectacle. Or if you need it wider, let me know.