Unfortunately plastic free toothbrushes and flosses are somewhat difficult to sell because people think they want them, but then they realize they fall apart easily and they dont buy them anymore. This is why its tough to find them on the market. But i will keep on the lookout if something comes up
Here you can buy toothbrushes with horse hair bristles and silk dental floss in a glass jar: https://www.amazon.co.uk/Gaia-Guy-Eco-Friendly-Biodegradable...