So there's the website www.chibify.com if you want something kind of nendoroid style. They're not as cute as nendoroids and there are limits to the customization for sure. But they're still pretty cute. Here's one I made of an OC, but I haven't ordered a physical version so I can't give any feedback on that.
You might also consider commissioning a polymer clay artist as well- I know a phenomenal one I can link you to if you'd like, who specializes in chibis and they are gorgeous. I'm not sure if you're hoping for chibis or otherwise anime styled, but perhaps commissioning a sculptor would be a good bet!