Bison dream catcher 3d stl model for cnc 3D print model

I originally purchased this in hope of being able to convert it to a printable 3D file because I like the artwork but the mesh has too many holes in it. Artist states that it is for CNC so I knew this going into this. My only problem is that I reached out to him a few times hoping maybe he could convert them for 3D printing as I would have gladly purchased more of his art but he has never responded back and 18 days for a response is plenty of time. I also looked at his history on responses and it is only 28%. I will definitely will not be purchasing anymore of his art.