Ugh...sorry to hear about your saga...I've been there...not with the RS6, but with a Mk4 GTI that I had (2.0 N/A, just before the 1.8t came out). It was at the shop for almost 2 years. There was some amazing fabrication done by some of the mechanics, and I did get to drive the car a couple of times in the middle of things. Car was pushing 375-400 whp out of a 2.0 with 16v conversion on a T4 ceramic bearing turbo (custom everything including intake, fuel tank, standalone ECU, pistons, crank, blah blah blah). In the end, I pretty much forced the shop to buy it from me (at a bit of loss for my sanity and wallet). At that point, I didn't even want to look at the car with the stress it caused me and left it at the shop. Turns out when I went to some no-name bank with the owner of the shop, he had to sign a loan 15% interest, but not my problem at that point. Turns out that the owner ended up dead by O.D'ing on snow a few years later. There WAS another VW shop nearby...that one mysteriously burnt to the ground one night full of cars...that shop was operating with a similar M.O., but I guess opted for the insurance payout...

After that, I didn't loose the car bug, but there is a reason why all of the pics from my former Callaway Rabbit build and current RS6 refresh are in my garage. I'm having a slight headache waiting for my transmission for the swap right now, but I think the end is near on that, fingers crossed!!!

I read through your first thread which was before my time on this forum and it looks like an amazing build that, like my GTI, wouldn't be feasible as a home project...all I can do is commiserate with your nightmare and wish you best of luck. Sounds like SAFE4NOW may have some good leads for you.