[Request] Research unlock via recovery

[Taurondir]

I have been trying to find existing ways to do this and did not come across anything fitting, but I am looking at the code ideas "unlocking" in this mod (https://mods.factorio.com/mod/bonus-crates).
If something that would fit or could be changed to fit this idea already exists, then feel free to post me a link.

This idea is for a "long term" custom game I wanted to try and do with friends, and would work like this:

* Lock some tech in the tree so that it's "greyed" out and can't be researched directly.
* Have an object on the map someplace (crashed plane, bunker, etc etc) that contains a "blueprint" that once located and activated actually "unlocks" the research item so that normal research can start.
* Allow distance to these objects to be set as high as wanted to actively encourage long-range mapping and exploration.

NOTE: I was (and still might) use an Earth scaled map (https://mods.factorio.com/mod/factorio-world) to play on, (starting in Australia) with a fixed Rocket Silo in Russia (Tunguska to be exact) Random Silo Spawn (https://mods.factorio.com/mod/RandomSiloSpawn) but bypassing the formula and hard-coding the Silo position by hand. I was going to position the additional Mods unlocks in specific places (USA, Europe, etc etc) by hand as well.

I wanted to use this concept to allow players access to some of the more "borderline" balanced tech - for example things like single tile splitters (https://mods.factorio.com/mod/Single-Splitter) and Sorters (https://mods.factorio.com/mod/beltSorter) but lock it so that they can't rush to research it to simplify bases too soon. I thought about upping the research cost by a LOT instead, but thought this idea would also make exploration more fun.

[HerpicusMcDerpington]

There are some item based researches that can be picked up on the map in my Angel´s and Bob´s map
As far as i know its Angel´s Farming (? think its bioprocessing, you have to pick up "gardens") that lock some of the reciepes, or you need them to build a certain assembler that then create some sort of special research token, not sure.
and something like explorers tokens, also something you have to "pick up" (mine) from the ground far away from your starting point which then can be used in labs to unlock some techs.

Im no modder, but if you find one, s/he can get some ideas from it i think.