How could l and how much generaly would it be to have a Peugeot 406 imported to the U.S.
Or where could l possibly find one within the U.S.

Unfortunately it wo not be possible. You'd need to get it certified for emissions and safety, which you wo not be able to do. This is a major undertaking, and for cars not already certified by the manufacturer it usually involves extensive retrofitting and crash tests that you have to pay for. Sorry.

Why, oh why would you want to go through thousands and thousands of dollars to certify a Peugeot for the U.S? There are dozens of great vehicles sold here that are FAR better than any Peugeot ever built and cheaper to boot. The only Peugeot you will find over here will be in a scrap yard (where they ALL belong).

dont waste thousand of dollars on that
i would believe you if it was a nissan skyline
but check ebay.com sometimes they have some