When I did mine, I wanted so simply stick some leather where the cloth usually lives. It ended up a job of epic proportions - luckily, it was my job at the time!
Here's how I did the black perforated leather bits on mine:
I made up backing cards (just for the leather) with large headed paper clips to hold them in, then glue on some foam, then cover in leather, then mark the holes for the paper clips, cut into the door card for the clips and fix.
It's hard to get the trim to sit right if you can't get the edges perfect, and that would be too much buggering about for me.


The blue bits were easy in comparison!
Re-using the door trim was something I wanted to do - I painted them silver, but there's no way I could get the fixings through the new panel into the fixing points.
Hope this helps!
