I made these models with Blender but it is available in 2 different formats, so everyone can use them:
obj.blend.
Blender file includes all Objects with a SubdivisionSurface modifier added (the one I used for the thumbnail and preview pictures).
IMPORTANT FOR BLENDER USERS: Since micro-displacements are new to Blender, you have to switch to Experimental-mode, so everything, especially the beef, looks how it should look.
For the rest of you, who is using a different Software: The models already got holding-edges so you can subdivide them without a problem BUT since I made everything in Blender, all other formats don't include a Material.
HOPE YOU ENJOY IT.......