The LSE in this thread has all OEM LSE body parts, including the front bumper cover. The CDC kit has a different front bumper cover, where the lower front part is fully open. Many (like myself) who have the CDC front bumper cover have created their own mesh grill using the stainless steel gutter guard from Lowes/Home Depot.
I unpacked the used one we just bought and it is the OEM one with the slats just as you said. ...gotta do more sanding and a little fiberglass work to get it ready for painting and installation. Amazing the amount of pitting from the road these things have to endure!