Hmmm shouldn't be a problem if you provide the textures, many mods with multiplayer clans/gangs do it like that.
About the problem with the distribution of those Armors or Items: It think a place in the factions base, for example the faction terminal, allows you to craft those armors with your tag if you have an existing armor that will be used up in that progress (the armor needs 0% det to counter ABUZE).
Only problem i still see: If it is done like this, we will have 1000 of additional item-IDs ingame for each faction and for each kind of armor, what wouldn't be good.
Also you would still need someone who implements tagged armors. Not a good job in this community as gangs come and go and trolls are everywhere.