This isn't one of those things that can be handled through a 'production run'
Parts of it might, but as an 'en-suite' build it's just not possible.
The indexing of the aperture/feature is one issue, a couple others would be the diameter of the 'screw head' and the thread/pitch/diameter/depth of the 'screw shank'.
Get to your local gunbuilder or machinist.
The design premise of the part shown above is simple and any machinist qualified for the job will be able to see what's going on and what's needed to make the project happen.
--Tinker
