Well, three months later the dealer gradually dropped the prices on all Touareg TDIs closer to market price, 14-16k under MSRP, and they disappeared from the lot. If they had been willing to negotiate at all in April, I would have taken the Exec off their hands, but no sale at only 4k off. Well, I'm more than happy with my Q5 3.0T, and will not have the whole diesel support issue hanging over my head. I continue to really, really miss the TDI experience, but the deck is stacked against diesels these days and I have sadly concluded that the era has passed.
Good luck to all of those who continue with TDI's, especially the Touareg, it's an awesome vehicle.