Well, kinda... After some fiddling around with the game's files this came out and it looks pretty good... Apart from a few minor glitches, and one bigger one - they work 90% correctly if it's on your own server. When I tried playing on a few random dedicated ones some animations came out wrong, and some were civilian-ish. Still better than Ro's hunchbacked animations though.
...actually, now that I think about it, Zoey's... I mean, Ro's animations, when playing as Zoey, glitch half of the time so this might not affect animation glitching at all.
In short: they work fine when playing on your own server or singleplayer, and go crazy when playing on a dedicated server.
------ IMPORTANT! ------
UPDATE: As long as whoever is hosting the server has the animations installed (I know for sure it works on local, probably does on dedicated too), EVERYONE who has the animations installed will see them correctly. And anyone who doesn't have them installed will see a very glitched Zoey.
Download link if anyone's interested: http://www.mediafire.com/?v6e8563og0w...
Bonus! New and updated single and dual pistol icon because the M1911s just don't exist in L4D2. http://www.mediafire.com/?18assqbaduw...