Just to share, for those looking to mod their chrome trim to shadowline look-alike or planning to rewrap your gloss shadowline, you may order the matt/gloss black stickers from www.bmwshadowline.com
What your problem? Is your problem have something to do with the trim coming off or moving?
My problem was due to the trim moving due to broken clips that was holding the trim. I just use black silicon glue (those that become hard after curing) to glue it back.