I have a Toyota Carolla. Had no idea about the used cat law. Someone suggested getting one from a junkyard and guesstimated the savings.
You didn’t state a year, but from the mileage I’m going to assume it’s a 2000 vintage Corolla.
Magnaflow (a well known maker) sells a direct-fit (as in bolt-in) OEM duplicate-but-better cat for that car for $1007.90 MSRP, and you can get it for less at their dealers. It is part number 46881. You can also get their high flow non-OEM but still direct fit/bolt up one for $584.95, part 23881. I recommend the former as unless you’re doing some tuning, some cars may set occasional cat error codes.
Note that these are numbers for non-California cars.