Hey man, unfortunately, that plug series isn't available to the aftermarket yet. You're stuck having to purchase it from the dealer
If you're willing to switch brands, Denso has a couple of options: PKH16TT is the new TT Platinum Plug - its an economical fine wire FK16HQR-11 is a long life iridium FK16HR-11 is a long life platinum/iridium with dual fine tips SK16HR11 is a long life platinum/iridium IKH16 is Denso's standard iridium power series
Shipping for 16 plugs will probably run you around $11 to that zip.
Use coupon code D0PLG10DTC through the end of the month for 10% your plugs!