RFVeitch

First post here so first off hello everyone. This is my first gas pickup in a while, I've been wrenching on and driving 7.3 and 6.0 powerstrokes since 2009 or so.

Driving today in my 2013 STX 5.0 and the CEL popped up. Pulled the codes with my scanner and I'm getting a p2272 bank 2 sensor 2 O2 sensor stuck lean. I cleared the code and went for a drive with my scan tool. When I pull the data sensor 1 is switching correctly and reading normal. Sensor two is stuck around 0.005v to 0.010v. Sounds like it's burned up right? If I'm correct this is the drivers side rear?
Where is everyone buying replacement O2 sensors and what should I expect to pay?
Thanks guys