The all in one looks like it has all the files you could want to make an elite, or even an arbiter, so that is a very good direction to go.
As a side note, you should not necro post on threads that haven't had any activity on them for almost a year and a half, you risk getting in trouble with the moderators. Additionally, that thread you necro'd HAS some of the armor files on it, so I am not sure why you asked for them on there instead of just clicking the links those guys posted. Look through the thread and you'll find the helmet and chest parts.
But the all-in-one has more elite files, so that's a better route to go. It can be a bit hard to search for, since the search terms can get strangled, so you'l have to navigate to Forum -> Creation -> pepakura -> All-in-one Halo Pepakura Thread
And there it will be!