I do not think its still being manufactured, but I'm not sure. SOG was still selling it a few months ago, but they are out. Widener's no longer advertises it, either.
I usually prefer the 147gr subsonic stuff for my G19, but I've also enjoyed shooting the lighter +p+ ammo that basically mirrors the performance of .357 SIG. 9mm Glocks, CZ's, and BHP's can handle this sub-gun ammo, and most of this surplus stuff is cheap, accurate, and very powerful. What more could you want? Maybe I'll get some of the IMI stuff if I can find it.
-David