The latest scan of the Stanford Bunny that I'm aware of was in January 2000, a CT scan: “The scale of the voxel data is 0.337891 mm x 0.337891 mm x 0.5mm in the x-, y-, and z-dimensions respectively. The greyscale units are Hounsfield units, denoting electron-density of the subject. The data is raw 512x512 slices, unsigned, 12 bit data stored as 16bit (2-byte) pixels.”
That link includes a download of the data, although I don't know how to open the files. Even though the scan is later than the original 1994 range data, I'm not sure it can be considered higher resolution for 3D purposes.