Must be talking about the o2 sensors- one is by the exhaust header on the left side of your jeep right where the exhaust starts to go towards the right side- this one leads up and is attached to another line that is attavhed to your fuel rail
The other is on the backside if the cat converter before the actual exhaust- this one is attached to a line that sits on top of your transfer case/transmission- easy to get to if youbdrop your skid plate- replace them with ntk and a good place to get them is online at www.rockauto.com
They have the o2 sensors labeled as pre and post-pre is by header an post is by muffler
Not sure if they ship overseas. Does this help?