Winchester/Olin is still cataloging it, but probably as a limited "seasonal" run. Maybe your LGS will back-order some if you pre-pay for it. I haven't seen any on a LGD's shelf in some time, but since I'm a 25 WSSM fan, I reload to better meet my specific needs.
The 2015 Winchester/Olin ammunition catalogs show the 85 and 115 grain BSTs and the 120 grain OPE. My favorite 25 WSSM factory load, the 110 grain AB, seems to have left us.
