S&W and Walther cut their ties. This was Walther's doing as they wanted to move their own base of operations to the US, for sales and tax purposes within the country. This only happened a few months ago, so you may still see some S&W branded Walthers out there.
Walther will provide their firearms for sale. The PPS is a bit of a mystery, when swapping out my 20 POUND TRIGGER on my MA PPS I lost a part to it which was never recovered. I sent in the firearm late January of this year to Walther's repair, since only a single gunsmith in MA would work on it (I called DOZENS). Since I didn't want to spend a significant amount of money on shipping, labor, and shipping again, I sent it to Walther, who told me they would have parts in early Feb. I've called every week since, and every call they push back the date they would recieve Walther parts.
To put it simply, I don't think they're getting ANYTHING PPS related any time soon. My Walther PPS has been in repair now for 4 months, it was in my posession about two weeks (I'm a good shooter, but there was no physical way around that trigger pull. You shoot 1 foot low at 15-25 feet no matter who shot it). When I last called the rep got so fed up with me calling every week for the past 12 weeks he said "It says two more weeks, but I just don't know man. I can't tell you." which isn't a good sign. Also, if you live in MA, do NOT get a PPS unless you get that trigger job lined up before hand. I spent a good 15-20 hours calling, driving to, and begging gunsmiths to do it. I even offered an experienced one $200 (The single part is $20) and got refused by every single reputable gunsmith in the state less one in the far, far west side of mass. I have, however, heard stories from lucky SOBs who's "H" disconnector lead to only a 10-12 pound pull, which is easily manageable.