STL file split then run to CNC Mach8 also have a stone Bit Profile made

I'm looking for someone to help me split an STL 3D model file and then run it through a CNC Mach8 machine. The file will also need to have a stone bit profile made. I have precise measurements for the split parts, and the CNC machine will be working with granite or other stone. If you are experienced in this type of work, I would be interested in speaking with you. Thanks!