Here are the pads. They are made by Centric, the new owners (as of 3 weeks ago) of StopTech. Centric is the largest supplier of aftermarket pads and rotors in the country and they make excellent, world class products. I'm excited that they decided to jump in early and make these pad shapes available for the SRT8.
Rear pads (left) & front pads (right)
I decided to confirm what I already suspected. The rear pads on the SRT8 are the exact same shape as an existing pad used in many Jaguars, Lotus Turbo Esprit, and a few others. The only difference is the addition of a squeal sensor, designed to make lots of noise when the pads are nearly worn. That's why the FMSI issued a new number for this pad (D1053). The Jaguar pad is D592. So you can use a wide range of pads manufactured in the D592 shape, but you just won't have any warning before the pad backing plate touches down against the rotor and trashes it.
The front pad is a completely new design. I took careful measurements and went through all my reference material. There has never been a pad for any other application made in this shape, squeal sensor or not. So for now, the Centric CTek Metallic is your only aftermarket choice for the front SRT8 calipers. Let's keep our fingers crossed that it's a good choice!
Now it's time for me to get out of my nice lunch clothes and into some work clothes so I can move on to the next stage of this evaluation. More updates as I go along!
