There also some other options when it comes to druids and armor. Druid I play wears Studded Leather. The only difference between the standard metal studded armor and mine, is that my studs are bones studs. Thus the metal restriction is overcome.
This is of course at GM discretion, but it makes since. Druids are some of the improvising chars in the game. With a couple of craft skills and a profession, they can provide the party with all sorts of items when in the wilds and not in town. You can even make some gold off your fellow party memebers;)
-I do apologise for potential thread jack, I just wanted to point out other options in case your player lacks the PA