A wireless kit for the Mac mini available separately?

According, to a MacBidouille reader, a well known French retailer, Fnac, sells boxes labelled “Upgrade Airport+Bluetooth Mac Mini� in its stores.

The reader purchased the kit for 100€, without any problem. The kit contains the Bluetooth module, Airport Extreme card as well as two antennas with their screws.

However, the reader noted that there is a sticker on the box indicating: "for AppleCare Service Providers". It is possible that Fnac has made this kit available for purchase by error so it's not sure that the installation of the kit by a user is supported by Apple.