Forget about original LR cats including their complete OEM exhaust system unless you really enjoy flushing money down the drain.
Owning a LR you'll already pay twice, once at day of purchase then a second time in dollar amount maintained by LR only keeping it alive for ten years.
With your damaged cats by impacts (rattling), antifreeze or run with one or more cylinder misfires they both may be dead. Dead like spoiled not functioning breaking down HC's.
Example, aftermarket cats like Magna Flows "High Flow Cats" out flowed LR OEM cats of OEM one flat body one round body of unequal flows to each other (really sucks) vs legal equal flowing aftermarket cats.
Presently running on year 13 and 15 a matched pair (equal high flow) cats on 95 D1 5 speed 4.9 litre LR that passed Calif. **** smog two weeks ago.
Holding at 6.6% (idle) and 7.4% 2,500 rpm of maximum allowed HC with other gasses way way way below max allowed.
Hot rodding on the street with a chip 13 and 15 year old legal aftermarket cats costing $87 each says volumes (in flow also) about these aftermarket cats not failing a couple years later vs other "El Cheapo" cats on the market.
OB2 cats now must be installed on OB1 Calif. vehicles costing many times more than OB1 cats.
Secret, install stored away OB1 cats (pre dated before OB2 law) cats with stamped heat shield dates not requiring OB2 installs only.
I have a out of state friend buy OB1 cats out of Calif. (49 state now not sold in Calif. cats), have said friend ship them to me replacing one failed OEM cat with now two equal flowing cats on a friend's 94 D1 5 speed.
A rattling cat can also cork up plugging the cat flow causing power loss and overheating problems.
Had that failure happen 800 miles from home years ago.
Welded 1/8" rod 36" long lengths together with a hook at end jammed up Borla's cat back exhaust system breaking apart the ceramic materials then blasting them out with a hard WOT run for a empty cat body and vacation trip.
No relation with Magna Flow just what has worked for years without future cat failures.
End of novel.
Carl.....~~=o&o>>.....