You're not going to "whip one out" on a cnc. There is several setup that have to be made so you can hold the part to be able to machine knuckles. You wouldn't get a shop to touch it, I say this owning a machine shop. Tell him that's why most places either cast them or make them out of plates and weld them up. Oversion is tge only ones that I know machines them out of a chunk a steel and he gets 2 g's a corner. He's so confident of how hard his would be to reproduce that he posted pictures up of the setups on pirate in the Rockwell hybrid thread, might be worth looking up so you could see what it would take to machine them. And they would have to be drawn up in 3 d. So you would need someone pretty handy with solid works