DUKE DYNAMICS has released a new rear trunk lid for the E93. It's similar to the CSL Trunk lid look that can be found on many modified E92 coupes. The part isn't inexpensive but it is highly unique and is a rather large part since it replaces the trunk lid and is not just a rear spoiler piece. It lists at $999, but is currently discounted to $845.
Check it out for yourself if you want to see some additional pictures of the CSL Trunk lid. more.