Tone replied to another member who had the same question in this thread.
To get the cat back system you will need to deal directly with John and I believe he requires 10 deposits to build.
I bought the cat-back when they were first offered [original style] for two reasons -
1. I wanted the ability to quickly change back in case the dealer gave me any flack about warranty work (I've been in a couple times and it was never an issue.)
2. I didn't want anybody cutting, welding, or otherwise defiling my baby. I wanted to do the install myself, and I don't have welding gear.

I haven't regretted my decision. I'm surprised that the new PV is not readily available as a cat-back system.