02 sensor

What's up guys, I have a rusted O2 sensor that I've been trying to replace but I've stripped the bolts and was wondering if anyone has had this problem before, it's the downstream after the cat. If you guys know of a shop who won't rape me on a price or can do it themselves that would be awesome! My neighbor said he would do it but he's been quite busy and I don't want to keep asking him to do it. Thnx

 

Im not sure where youre located in Phoenix but I took mine to scottsdale muffler (https://scottsdalemuffler.com/)
I had them redo my cat and fix a exhaust manifold crack. Fairly priced and honest guys in my opinion! Good Luck!