I also have an 08 Unlimited, I did extensive searches and only 1 place was complete and one stop no hassle for OEM Doors. Long Island N Y Jeeps Are Us
Even the dealer could not match price or get the doors this way and shipping wasn't that bad. Now you are going to spend some money, everything you need for the doors is there, then you need to paint and doors keyed to your key, but to me it was worth it.
Other than that if you have a 2 door look on craigs list you can find pairs mostly. Hope that helps.