Believe it or not, I recall that Bersa (of Argentina) was marketing one of their very popular .380 pistols in what they called a "less than lethal" package. I personally thought was an ill conceived idea, and apparently they eventually did, too, because I stopped seeing them before very long. This was several years ago.
The idea that a .380 could be turned into something between a stun gun and a lethal firearm seemed dubious, at best. True, most people don't die for handgun wounds, and true, .380 isn't the most powerful cartridge, but my confidence in the manufacturer's claim would be low, even with light loads. To be fair, I don't know what kind of ammo they're talking about, but they did include it in the package, as I recall.
The defenzia video that someone posted could be an option. Looks promising. Though I'm not in line with the OP's intent, I don't find his goal silly or foolish. We all have to develop our philosophy of defense for ourselves.