Anyone have this up for download? Preferably in MP3, but I'll take FLAC too. None of the links in the downloads forum seem to be working.

You can find it here: http://download-soundtracks.com/movie_soundtracks/pacific-rim-soundtrack-by-ramin-djawadi/

You do not need to have a premium Hotlink account, but it will be slow

or try this torrent

https://rutracker.org/forum/viewtopic.php?t=4511741

Do recording sessions or an expanded version for this exist anywhere?

Unfortunately not yet as far as I know, hopefully one day.