"Mods" here refer to text-based "configuration" of openxcom engine... e.g. changing laser rifle damage from 40 to 60... something that doesn't require any coding skills and can be potentially done by your grandmother (figuratively speaking).
What you are asking for cannot be "modded", but must be "coded".
So either you convince openxcom developers to do it... and then it's not a mod, but a "feature".
Or you convince someone else to implement it in their own version of openxcom, so-called "fork".
But chances of finding someone to do this are probably quite low... since there is little motivation for something like that (I assume).