The difficulty in adding an Airport card to a G5 Quad

Apple did not deem it necessary to install an Airport or Bluetooth card by default in the G5 Quad.
However, it is now more complicated to install these options than it was before.

In fact, it no longer uses the old Airport Extreme card. It now uses a new combo Airport/Bluetooth card which is not yet for sale. Even more annoying, an Apple Authorized Service Provider or a retail Apple Store is now required for installation of this card because of the internal antennas (see picture above).
It is an unpleasant discovery to make after having purchased the G5, which makes us think that Apple should have made the option a standard feature.