The slight issue is that the Wiki Page is largely out of date and there doesn't seem to be any development on this, though it is "open source" and you can edit away, no one has really bothered to do so. When I was playing ECO earlier last year I was talking about some sort of game scraper to pull all the data. Even though I am a software engineer student, my brain is very much smaller than a pea, so me trying to come up with a solution to do this caused me many headaches to the point I gave up. I do believe there is a Mod that did this but its also for an older version of the game so I don't quite know what the implications of that are when using on newer versions as for some games, mods are either very much version dependent (i.e. Minecraft Mods) or are a "may cause issues but can run" situation (i.e. Minecraft Texture Packs)
I think the way I would do it would be the tedious way and be all manual but psudocode it in a sense. I would lay it out like JSON files but then have say MechanicEngineer[1 Screw: 8 Iron Bar] as an example and then figure out a good way to cook it all up. Do note that some of your Pricing Calculators may have a Github page for it in which you could technically Fork It Out and take the required data.
TLDR: Either make a game scraper application or manually write everything down
Edit: When making your own Calculator there are two calculators to do technically, 1 is just Item to Item based i.e. X Planks needs Y Logs. You will also need a Calorie addition to this - since you are talking about item -> item trade you will need to take into consideration the calorie cost as well.
With the Game Scraper I believe the talks was about creating either an API or having some sort of script to pull the data every X hours from a locally ran server
devtrackers.gg