CDKeys has 1 year PS Plus subs for $29.79. I purchased one today and used PayPal with no issues. You can stack multiple years of PS Plus.
https://www.cdkeys.com/playstation-...2811ea8fa5ca32e05c6d670INT&mw_aref=slickdeals
https://www.cdkeys.com/playstation-...2811ea8fa5ca32e05c6d670INT&mw_aref=slickdeals