Seeking recs for flexible shipping/factory work

I’m a freelancer in the film industry hoping to find some consistent supplemental income (1-3 days a week when I’m not on a shoot).

I prefer boring, repetitive work- the kind that you can do while listening to audiobooks. Does anyone know of any companies that hire this type of part time position? They don’t need to be hiring currently, just hoping to get a list of ideas.

Thank yoooooou