Yeah, only special random top of the range Panda's had them along with plastic covers for the 'A' Pillars and plastic covers for the rear wheel arches so rear passengers don't get cold builders bums.
Complete randomness as to what Panda's seem to be fitted with them. We had 2 Selecta's, 6 weeks different in build and both identicle except mine has the extra bits of plastic (and seems to be a tad faster :slayer.
I've seen some CLX's with it also. They were factory fitted in my Selecta I believe, on the basis the black bits normally bunged all the holes are open holes when the trim bits are removed.
Could have been retro fitted I suppose, but also believe that I've seen 'Super' models with the black door trimming with them also.