I picked up two pieces of shadowline from a local friend who parted out an M5 as a favor because I'll be wiring/base tuning his car.
So I popped my old chrome trim off - it looks like the PO resorted to some sort of glue in some spots. Hrm. So now I place the shadowline one up and the back by the window pushes in with grommets but the rest has what look like little black clips... only they don't seem to uh.. clip.
This is just the upper pieces - I dunno what I am going to do about the lower window ones, he didn't have those pieces.