Last time I checked the 3913TSW was still being produced for LE agency orders, and could still be bought on an individual officer basis from a S&W LE Distributor (meaning an LE distributor and not an ordinary commercial S&W stocking dealer).
The availability depends on whether there are presently any of whatever model is desired sitting on the shelves in their vaults. The price is up to the distributor, too.
S&W commonly makes more units than are required to fill any given LE agency production run and then keeps them on hand.
I was told of a cop who happened to be able to pick up a current production 5906 through a distributor in that manner. Not a TSW, but an actual standard '3rd generation' 5906, newly produced. It had been part of a normal overrun of some brand new 5906's ordered by a large agency who was still using 5906's and needed new guns. The officer lucked out in that apparently there was still one available sitting in the vault which hadn't been allocated for anything.
I think LAPD has still ordered some 4506's & 4516's (4516-3's, I believe) from time to time in the same manner.
I've also thought about adding a 3913TSW to my collection before retiring, to complement my late-production 3913.
I've always thought the 3913 (in all its variations) was close to being the definitive example of a state-of-the-art compact, traditional double action, metal-framed, single-column magazine 9mm defensive pistol.
Okay, a number of folks
also happen to like the 3953 DAO variant.
I wouldn't turn down my nose at an excellent condition 908S, either. It's just that the current TSW version offers some additional features not found on the original 3913's & current 908's, such as the heavier box-type rails, loaded chamber visual inspection port and slightly delayed unlocking. I'm not all that interested in the accessory rail on the current production TSW's, but that's because I'm not in the habit of hanging lights on handguns, especially compact models.
If somebody at the S&W factory would agree to grant a single request for a special production run, I'd ask for an all-stainless steel 3916TSW (the '3' in the 3913 model number meant the frame was aluminum), with night sights. If an accessory rail
had to be included, I'd at least want it to be one of the integral machined types as currently available on the 4006TSW & 4566TSW for LE orders.
An all-steel model would probably make the already decently controllable (personal opinion) felt recoil of the 3913 even better. I'd put up with a bit of added weight.
Just a daydream, though ...