I think it's in 'fooley's commands'. Although it's rather easy to make yourself and would only take a couple of seconds.
function servercmdresizeme(%client,%x,%y,%z) {
%client.player.setScale(%x %y %z);
}
I don't recommend you use this straight off, as it probably doesn't work as i can't be bothered to look up how the setScale command works, and also has no limit so people could crash your server easily. But you see the point.