There is something close to what you want, it's a Smith 657 that Lew Horton brought out in the 80's, they made either 3000 or 5000 of them, I don't remember which. I had one for several years and loved it, still drool over the pictures I took of it. I kept doing trigger jobs on it (mostly polishing the innards) until it was so sweet people fell in love with it instantly. With factory loads it had incredible muzzle flash, but it was solid and very controllable in rapid fire. I could never use it as a hideout, but did carry it off-duty for a time. They occasionally show up for sale, you just have to keep looking.
Personally, I like the idea of a 3-inch five-shooter on the L frame, but I doubt we'll ever see one. If they do make it, I'm getting two!
PJ