I usually buy Urtekram toothpaste, these toothpastes do not contain any fluorides.
I also found an article earlier on how to make your own toothpaste, but have not tried it myself yet.
https://steemit.com/health/@pandapoef/guide-to-diy-toothpaste-a-natural-recipe-that-is-simple-cheap-and-effective
RE: Fun Fact: You are absorbing Toxic Fluoride regardless of if you swallow it or spit it out!