One last thing, the spare door and ignition key, (51218236594) when ordering that key does it come all ready cut or does BMW charge extra to do so?

The reason I'm asking is because this key (and the cylinder for that matter) seems to be available from other retailer besides BMW. but I wonder how they have these items available. Do they (the Retailers) have access to your VIN and are able to sell you the coded cylinder and keys that work for a specific BMW?