Wow. These are cool. They were listed as part of the original cooper conversion 2 years ago but my car didn't ever come with them because they weren't available. It's taken this long for them to be released!

My order will be in with JCW this morning!!! I've also got a sunstrip to go on with the same logo. This is a one off though ;)

Same part number for left and right?

Same part number for left and right?
Your question is answered in Post # 36 of this thread.

If you start reading from there, you'll also find out where to order the sills at a discount.