Where can I get the Plex app PKG file when PSN is not available ?

I have a jailbroken PS3 running custom firmware, so I can run my BD games from HDD. This is not just the most convenient way to use these games, but is also the ONLY way once the BD drive has died (like it was designed to do over time). Apart from the BD drive everything works perfectly, but due to the jailbreak status my PSN account has been banned from further PSN access.

Thus I need an alternate download source for the Plex app PKG file.

Btw: I can already access my Plex content through my PS3, using the Plex plugin of the homebrew media player Showtime/Movian, but I would prefer to use an official Plex app.

Best regards: dlanor