That's an incredible paper! The supplementary materials are exquisite and can be obtained here [0]. I'd very much like to get ahold of the enormous raw dataset, but alas their margin was too small to contain it: "Owing to file size limitations, no repository capable of archiving the entirety of the voxel data for these scans currently exists".

[0] https://datadryad.org/stash/dataset/doi:10.5061/dryad.b451g