I think REMHQ just took them of the net if no official version existed. The Orange Crush ones for example were a complete net lift.
As I mentioned elsewhere, I'm sure Mike & Michael sing 'Colour/Color' as opposed to 'Collar' as it makes much more sense considering the song title and the spraying of Agent Orange by the helicopters. Michael also made 'skooshing' noises on the record in between 'coming in fast' and 'over me' (and also live in 89).
The megaphone section is also word for word what the websites had in 2003 when REM HQ added lyrics for the Best Of - I'm sure the phrase '...until i came here and I was (playing for the??) college team' is spoken at 2.28. Disappointing and lazy lack of effort by REM HQ as those net lyrics ended up in song books and therefore some would like to regard them as official.
The lyrics for "Stand" posted on The Complete R.E.M. Lyrics Archive are listed as "official" though I'm not sure what the source is.