That car posted in this topic post is too high priced, as Chris says the dealership taking his cut.
It also appears to have either been jacked into position on the rotating display, the swing-axles positive camber making the car sit at a false ride height. If the car is rolled back and forth it should drop down. If that doesn't do it, a torsion bar adjustment will.
wrkinprogress: if you catch Alan at the right time, he can build you what you want from somebody's unfinished project. That's his specialty. Or you could go with Beck in Indiana or the east coast Vintage dealer.
If you put an 911 SC motor in a Vanagon, I'm betting you could build your own if inclined. I think Vintage is a good bet for a body.
Cars do come up on craigslist, ebay, or other classifieds. Unfinished projects are seen on thesamba.com as well.
I live about 70 miles northwest of NYC, and have a self-built Vintage Spyder.