Looking for a grasshopper expert to help with a project: spongy structure

Hello, I’m looking for someone to assist me with my personal project of creating a structure similar to a bone, consisting of both cortical (dense) and spongy (porous) port. I have the solid bony object as an .stl file; what needs to be done is to keep the surface of the object (the cortical bone) solid and convert the rest (the inside part) to a mesh structure (spongy or reticular bone). The spongy/reticular structure must to be in form of a closed mesh and connects smoothly to the surrounding solid part. Also I need the file allows changing the thickness of the surrounding cortical/solid layer (the part not converted into spongy structure) and gives me flexibility for that.
Please contact if you are interested and able to help and we can discuss the details.