You can take any song, change the key, change the parts (Give the soprano note to the tenor, give the Alto Note to the Baratone etc... to fit your needs.
I do that with all of my groups. You don't have to just do "men" selections... your library is limitless when you look at things that way...
So if you want to do Friend of God, then change the key to a key that will work for the guys you got. The song is in E natural... change it to C# and give the Alto the Ab/G#, the Tenor the F/E# and the baratone the Db/C# for the "I am a friend" for the "Of GOD" part give the Alto the F, the Tenor the C#/Db and the Baratone the Ab/G#...
Ya dig?
MrSparrow