S&W rearranged their web catalog to match their sales of different firearms.
Except for the 3913TSW & 4013TSW, they've generally discontinued commercial sales of the more expensive TSW line, limiting it to government & L/E customers. I was told that if a major distributor wanted to place an order for a significant number of them, however, that they would make them. Sort of up in the air.
They have been selling various TSW pistols to L/E agencies, however, and in greater numbers than various detractors would have some folks think, too.
Their major focus has been on getting the M&P line introduced and accepted for L/E use, though.
I've heard of some L/E agencies still prefering and ordering the original SW99 TDA models, and S&W will continue to produce them for agencies desiring them, although they're pushing the QA-type SW990L models which are the current commercial offering.
The first I heard of the new railed SW1911 model was when it was accepted for issue by a West Coast SWAT team after various competitor's pistols were tested and evaluated (I believe it was Riverside County SWAT), and then it later appeared in the standard catalog.
Every time I receive one of their catalogs it seems the entire thing has been rearranged, too.
The new one is pretty slick, though.