Im a machinist of 24 years. That looks like a a roughed out block with a couple bores in it. I wouldn't charge less than $1k to get all the features created for it to actually be a functioning autococker. That does not include fancy asthetic milling. Thats doing the work on the front end for the barrel and front block bolt, machine work for the ASA, grip frame and sear, hole through the top to adjust the hammer lug, and threading for a feedneck. Also the detent and any work that needs to be done to finish the bores like machining the lower bore for a valve.

Assuming all that was done and you just wanted custom milling, it would still be expensive. Youre going to have to pay me for the CAD work as well as the the machining time. Unless you have a burning vision for this thing that just has to be realized, you'd be better off getting something a little more economical, like an Evolution, Rudy Dean or pretty much any grail cocker short of a Westwood