What sort of 'big tires' do you want to put on your rig, tovrin? You can squeeze 33's on a stock Jeep, but you might find that they rub when your steering wheel is at full lock (depending on the tire width). Also be advised that if you want to go wider (285+), you'll either need spacers or wheels with a smaller backspace than stock (and probably a lift as well). There's lots of info in this thread
on the subject.
Let me know if you're looking for a set of stock rims, though... I just pulled these off of my 2010 JKU. I'm over in Melbourne, FWIW: