Another choice, software-wise, is Zbrush or Mudbox.  Through displacement mapping of extremely high density meshes with very detailed, and accurate texture maps; Zbrush and Mudbox can displace billions of polygons if necessary, and create 3D-printable results.

http://www.badking.com.au/site/shop/environment/physical-characteristics/

I've seen STL files generated from NASA photos of the lunar surface done this way, but only in segments, not entire spheres.  Since Zbrush starts with a Zsphere as the base object, mapping a spherical texture of the lunar surface to it, as a height map, shouldn't be an issue, if such a texture file exists.

______________________________________

My Store
My Free Models
My Video Tutorials
My CG Animations
Instagram: @luxxeon3d
Facebook: https://www.facebook.com/luxxeon