i can tell you they are not a copy of the oem ones - they are quite different - as i have the oem ones. oem are 4 piece.
although his do not look too bad i wonder how you mount them up to the body securely? i can see only 4 mounts - and nothing near the top edge at all (this is a problem with just about every set of "aftermarket skirts" - the factory mountings make them very difficult to mould so generally most get removed, unfortunatly leaving you with a skirt that flaps around at speed...)
if you don't know what i'm talking about i'll post a pic of the underside of an oem sideskirt - there are 11 mounting points on them!!