Loved the model by Maker81 - and so did the kids. Needed a comically long version to make it bite it's own tail!
I've just pieced together the model in PrusaSlicer.
As I had problems printing the upright upper jaw with my Mini, I've also added a version with some braces at the joint. Just slice through the connecting parts (2 perimeters thick) - easily done with a hot exacto knife (see picture).
The author remixed this model.