I've downloaded a copy of Brahms Wo ist ein so herrlich Volk (8-part choral), No.3 of his Fest- und Gedenksprüche Op.110 (I think, might be 109) from the Choral Public Domain Library, which is a great resource. There are a couple of places where the line is rather odd and I'm wondering if something has been written in the wrong octave. If anyone has a copy from another edition and wouldn't mind checking please could they PM me? CPDL offers free a massive collection of PD choral music in various forms including .pdf files, MIDI, Finale, etc.

http://www.cpdl.org/wiki/index.php/Main_Page