We got them and you can find huge orchestra reductions into piano solo in OLC Barcelona Music's webpage http://olcbarcelonamusic.musicaneo.com
Check a couple here:
http://olcbarcelonamusic.musicaneo.com/sheetmusic/sm-73629_adagietto_from_5th_symphony_for_violin_and_piano.html
http://olcbarcelonamusic.musicaneo.com/sheetmusic/sm-73628_mahler_s_symphony_no_5_for_piano_solo.html