2000 Toyota Camry Catalytic Converter

Hi Pros,

I had by check engine light come on with code P0420 and was told the car must have been built in California based on the converter. I live in Wisconsin now though and must get the light off to pass emissions here. I do not believe it is required by the state to have one, but the light obviously cannot be on to pass. I was looking for some advice on what to do. Should I try and remove it and clean it? Is it possible to replace with something else (I've read about a pipe or something), or do I just need to replace it? The estimate I got from a dealer is over 1400 and that seems ridiculous.

Thoughts?

Thanks for your help,
Jonathan