I found this atlas that has become recently available in a few template spaces, but there is no integration with AFNI yet.
[
www.bangor.ac.uk]
The one cited here should be available in Talairach-Tourneaux space
Three-Dimensional MRI Atlas of the Human Cerebellum in Proportional Stereotaxic Space
Jeremy D. Schmahmann
[
dx.doi.org]
A preview of this atlas is available on Google Books.
Also this version:
MRI Atlas of the Human Cerebellar Nuclei
A. Dimitrova
[
dx.doi.org]
This atlas was recently published in book form:
Duvernoy's Atlas of the Human Brain Stem and Cerebellum
[
www.springer.com]