I believe he put it on the site after I ordered mine through him.
This is the wrong thread, but I'll make a thread in due time.
He can get any of the Garrett's, I think he just put it on the site because now it's in his system. And yes, he's working on a flanged modification of the stock mani.
Once the legwork is finished on mine, I suspect he will offer it as a core swap type mod. But I don't want to speak for him. This is just my speculation.