Yeah, if you Google them, CryptiaCurves are on X/Twitter, SubscribeStar, and their own Itch.io page here where the Blender/Unity models are sold, though not all free ofcourse, with this particular bundle being a big price of $208, so it might be best to wait and keep them on your radar for when the project's budget grows.
Plus, I will say that their models are more on the extremely thicker side 😈. So I would recommend that you make new animations rigs that work well for their physic 🤣. Nevertheless, since those models are already widely used in VRChat, they are built to be highly compatible with VR interactions.