Sorry, your email got lost in the shuffle. Reply sent this morning. But here's the skinny.
The array is ordered separately.
http://www.speakerhardware.com/custom-tweeter-array.php
Select with a kit, which style you want, either melded or straight, put in the message field what cab you're building, and order by the total quantity of tweeters you are buying in the kit.
When you order with a kit, it subtracts the piezo price from the array, assuming you're getting them in the kit and buying the actual tweeters in it.