Harold Hall wrote a construction article for a filing machine starting in MEW 161, March 2010.
One of the segments had suggestions for adapting hand files; another had sources for purchasing machine files.
MEW 155 also had a die filer on the cover but I don’t believe that a formal article with drawings followed.
The Workshop Practice Series #31 also has construction drawings and notes.
Popular Mechanics had an article: “Mechanics of Machine Filing” in the July 1943 issue.
You can obtain it from
At the same url you can obtain plans to construct several machines: look at Feb 1941, Oct 1947, Mar 1957.
Searches on other machining forums, for example, Home Model Engine Machinist & Home Shop Machinist will certainly provide many threads. Don’t have an urls, tho’.