https://wccftech.com/1-year-ps-now-ps-plus-premium/

From the looks of it, players can still officially buy a one-year PS Now subscription, which should give access to PlayStation Plus Premium this June. 

Last week, Sony finally announced its all-new PS Plus plans, including its merger with PS Now and the addition of three different subscription tiers, including PlayStation Plus Essential, PlayStation Plus Extra, and PlayStation Plus Premium. The Premier tier will cost $119.99 on a yearly basis and will provide all of the benefits included with the Essential and Extra tiers, in addition to adding up 340 additional PS3, PS2, PS Vita, and original PlayStation games. Also, this tier will include time-limited game trials for subscribers.