Help with cadillac converter on a jeep laredo 1992?

size engine jeep have? catalytic converter cost @ least $90 bucks replace yourself. there no way possible repair converter itself. catalytic converter super exhaust air filter.
can change thing or take repair shop. if work yourself, highly recommend purchase original factory part or @ least 1 has same specs factory part. if live in part of country requires emissions testing, should not buy cheapest one. reason being jeep may not pass testing requirements.
folks may tell remove 1 have , replace length of exhaust pipe. not that!
if ever decide sell jeep in future, may or may not have provide paperwork prove changed. if remove , don't replace potentially new owner in serious trouble. when replace part, keep paperwork new part , make copies put vehicle.

any info can lot. do? how can fix it? how least cost fix

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