It seems, that there were enough cars exported to the USA, that a few clubs could be founded:

http://www.citroen.ac/aclubs/ergebnis.asp

..for Citroen. I haven't found an American Peugeot-club.

But for Simca!
http://www.centuryinter.net/SIMCA/

and Panhard!!
http://www.panhardusa.org/