I ran into the same problem when I did ED in 2011. Since I purchased my car through an out of state dealer I did not drive 3 hours to ask for these plate screws. I went doen to my local dealer and since I know one of the service advisors I asked for some plate screws. He got me the plate screws for free of charge.
2013 M3 AW Extended Black Leather ZCP Fully Loaded Carbon Roof 6 Speed Manual Trans