Find another muffler shop - not a chain like Midas or Pep Boys. Find a small independent one that other shops near it recommend.
The small dual cats from a dealer are about $700 - but there is not much to go wrong. It would take an awful lot of crud to plug one up.
The big one may go as high as $200. It's just a standard CAT, nothing trick about it.
Even if you needed both, 700+200+labor, it's a far cry from 2K.
And before replacing anything - reset the computer back to default. No matter what others say, there's really only 2 ways you can do it.
1. Use the Chrysler DRB III diagnostic device - not sure of the price but over $10,000.
2. Disconnect the battery for at least 12 hours.
To me, #2 makes more sense.
Clearing codes with a scanner only clears codes, it does not return the computer to default.
There are lots of rumors how to clear the memory quickly - some partially work, most only clear the codes but do not reset the internals. You want it ALL reset.
After the 12 hours, reconnect, then you need to drive it for about 20 miles - drive it easy for the first few miles, then faster and harder. It has to re-learn everything.
A scanner at first will tell you that the battery was disconnected - then as more and more portals open up, it will show any faults that exist. It can take as long as 100 miles before all the portals have opened and it's back to normal.
CATs fail in 2 ways - plugged - due to overheating from a misfire. A vacuum gauge will tell you if it is plugged, not the computer. An infrared laser type thermometer works even better to find a plugged cat.
Guts blown out - The computer detects there's too much O2 getting to the downstream O2 sensor - an exhaust leak or a bad O2 sensor can do the same.
Why are you suspecting a CAT problem?