That sender didn’t break itself, whoever (your mechanic maybe?) was in there last most likely broke it trying to get it out. You have to take the float off of the orange plastic holder before trying to get it out of the bung hole, it’s easy to do but you have to know how to unsnap it before you snap it (break it). I don’t know if you can buy the sending unit parts alone without buying the whole unit, and a whole new unit isn’t cheap and most used units do not come with the sender parts as they get transferred over to aftermarket stuff. That could be a very expensive F up.