Last I knew, most Hooker products were from Mexico, but most of my info is outdated as I stopped
paying much attention. Maybe the company purchase (doesn't Holley own them now?) put pressure on them to cheapen things up, like
almost everything else these days.

This might sound stupid but my favorite breather grommet is OEM Mopar number 2946079.
It's a little bit larger than the usual aftermarket stuff, and fits the 1970+ style breathers with the tube.