Need to find o2 lamba sensor

Hey guys

I have an exige s2 2006

I had the code P0172 come up on the dash a couple of times. The lamba sensor popped out from the exhuast a couple of weeks ago so had the surround welded back in but i feel the sensor might of been damaged.

The car drive fine but engine man light with code p0172 comes up. The car seems to cut out randomly at some not all roundabouts or traffic lights.

Where is the best place to find the right lamba sensor as this is the only thing that has changed before it started acting strange? Thanks

There some for sale in the sale or wanted section just now.

Ooo thatsgood timing thanks