only thing that comes in pieces is the side skirts, because of the jack covers. front and rear fascias are one piece.
front is about $200-300
sideskirts $50+ each from bill jenkins (not sure if hes still doing that deal)
rear $500-800
my suggestion is just to go with hellahydros kit in the group buy...whole kit costs no more than $750.
it can be seen here:
http://www.contour.org/cgi-ubb/ultimatebb.cgi?ubb=get_topic&f=27&t=000427&p=