The single STL with the skull and jaw should be printable, with a lot of support, but I mostly included it for presentation purposes. With the dissolvable support it should be much fairly easy to print.
I have printed this several times at 2X actual size. Mainly just because it looks weird and terrifying at this scale. I print the cranium and jaw separately, with each oriented in such a way that contact between the teeth and support is minimized. As a mammal paleontologist I tend to overemphasize the importance of teeth, even in 3D prints.
I don’t currently have any photos of unpainted prints. I painted this one to look a bit like a Pleistocene fossil. I jokingly refer to it as the “Ice Age Hell Badger”.