If you live in Denmark, the Meyers bakeries will give you free starter, just bring a container: https://www.meyersmad.dk/om-meyers/meyers-virksomheder/meyer...
Same everywhere where there's artisan bread-making. Just ask if they have some and they'll gladly gift it to you or tell you when to come back.
My local bakery actually wouldn't give or sell me a starter because, and I quote, "I'd feel bad selling something like that, and it's too easy to start yourself".
He then gave me instructions for starting the starter myself.
It's been fun, and way less fussy than the internet likes to make it out to be. Except this page. Y'all seem to have the same abusive relationship to your starters as I do,.