There is a demand for locally printed whistles for communities where ICE is or forecast to be.
If you are interested in printing whistles for your area, search “ICE whistles [your area]”. You can use either your state or major nearby city. If you are interested in printing whistles, but can’t find anything, let me know and I can see if I can find a local org you can support.
Sadly it’s not just a question of expensive anymore, it’s also a question of whether they can track your purchases (they can) and whether those purchase records will eventually have ICE banging down your door in the middle of the night to have you disappeared for your seditious act of buying justice-obstructing terrorist whistles.
3d printing is not impossible to track either but it’s certainly a lot harder to track when you are using basic internet hygiene and money isn’t changing hands.
Cash exists.
https://www.partycity.com/translucent-whistles-24ct-912860.html
Counterpoint: Flock cameras also exist. Surveillance police state dystopia is already here and it’s spreading much faster than I think most people are prepared for, we have to take it seriously.