keep in mind that the meshes are extremely low poly
here's an example of what a bile looks like without textures
https://www.thingiverse.com/thing:3852289
to rip them your self, you'll need couple of tools and a 010script to convert them to a useable format
and here's a recent reddit post with couple links to 3d models
https://www.reddit.com/r/dungeonkeep...y3p/?context=3