It's ported from New Vegas. I'm thinking of asking Gambit77 for permission to release a Fallout 3 version, but it would take a little while even if I get permission as I'd like to implement it in the gameworld somehow and just not have everything available in a box or something. The original is very thought through and uses iversified Mojave Wasteland to get NPCs to use them:
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http://www.nexusmods.com/newvegas/mods/56581/?